Nucleus Orders

Mar 7, 2018
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Arizona
PVA is doing the action wrench with release slated for July 20. Nucleus specific BarLocs for savage type barrels are currently backordered. The recoil lug has the taper for the Barloc built in. I’m hoping that there will be enough room on the threads for a non nucleus Barloc to work as that is what I have at the moment. Fit it up on an SR3 and it is super simple.....but there wasn’t enough clearance with their rail for it to work.
The only difference is the tapered recoil lug does not have the nub on top. If you use the Nucleus recoil lug and the tapered washer, it should fit. I had nearly 1/4 inch of extra thread on my Shillen with Barloc on my Nucleus.
 
Feb 23, 2017
60
30
18
Any complaints on the nucleus so far? How does it compare to other custom actions as far as bolt lift, tolerances, smoothness, fit and finish?
Finally got mine (single digit SN!) yesterday.

The bolt lift is surprisingly light (I had TriggerTech Primary trigger installed on mine), even when comparing to two-lug design.

I got it with Nucleus barloc, and it headspaced NSS Criterion pre-fits no problem.

The bolt stop is different from the CAD shown on ARC's website. Instead of a polished pear-shaped knob on the left side, it's round with checkering - I think I like the CAD design better, because it clearly shows the position of the rotation.

Overall I'm very happy with it, and at pre-order price it's a steal. Wish I ordered one more. :)
 
Likes: hereinaz
Mar 7, 2018
310
193
43
Arizona
Any complaints on the nucleus so far? How does it compare to other custom actions as far as bolt lift, tolerances, smoothness, fit and finish?
No complaints. Fit and finish is excellent. Bolt lift is shorter, and I wouldn't trade it for a lighter bolt lift at this point. Throw is shorter and lift is lighter than any factory action I have run. And, it is very smooth to cycle.

It does break in with some cycling and dry fire, and I bet it will continue to break in. I can see very even wear on the bolt head and all the lugs in the action where the finish is wearing down as the action smooths out. The toroidal system works pretty amazing in that aspect.

I have very limited experience with any custom actions to compare, so can't give you any direct feedback. Also, I like nice stuff, but I am not gonna be completely picky. It's good enough for this trigger jerker.

I am gonna shoot it tomorrow, if all goes to plan.
 
Likes: BLKWLFK9
Mar 7, 2018
310
193
43
Arizona
Finally got mine (single digit SN!) yesterday.

The bolt lift is surprisingly light (I had TriggerTech Primary trigger installed on mine), even when comparing to two-lug design.

I got it with Nucleus barloc, and it headspaced NSS Criterion pre-fits no problem.

The bolt stop is different from the CAD shown on ARC's website. Instead of a polished pear-shaped knob on the left side, it's round with checkering - I think I like the CAD design better, because it clearly shows the position of the rotation.

Overall I'm very happy with it, and at pre-order price it's a steal. Wish I ordered one more. :)
I am glad I am not the only one wishing I had another...
 
Apr 7, 2011
53
19
8
Central WI
Finally got mine (single digit SN!) yesterday.

The bolt lift is surprisingly light (I had TriggerTech Primary trigger installed on mine), even when comparing to two-lug design.

I got it with Nucleus barloc, and it headspaced NSS Criterion pre-fits no problem.

The bolt stop is different from the CAD shown on ARC's website. Instead of a polished pear-shaped knob on the left side, it's round with checkering - I think I like the CAD design better, because it clearly shows the position of the rotation.

Overall I'm very happy with it, and at pre-order price it's a steal. Wish I ordered one more. :)
I too was a little sad to see they changed the shape of the bolt stop, but then again I think a tear drop design could cause issues with scope mounts blocking the rotation of the bolt stop. With the round style there’s nothing really to worry about.
 

Winny94

Sergeant
Nov 19, 2013
685
96
28
Picked mine up during lunch today (for those still trying to do vudoo math, i was order 245X and this serial number is in the 60s).

Obviously the machining & finishing work is top of the line. Im glad they kept the Mausingfield bolt knob. I think I got more purchase on the tear drop shaped bolt stop at SHOT rather than the knurled knob, but that could be because I was playing with my stripped action vs the JH rifle at SHOT. I wish the bolt lift was a bit lighter, but the short throw is slick. The thing that really got me is closing the bolt - I havent felt any action quite like it. This is defintiely the highest end action ive owned, but ive played with pretty much all of them at some point. Closing the bolt almost felt assisted - similar to an assisted opening folding knife if that makes any sense. I can run this bolt faster than any other action ive tried because of it. Can't find a single thing to complain about - even the serial number location is slick - very clean appearance. I too wish I wouldve ordered a 2nd, but in long action.

Unrelated, but if anyone has had enough waiting for a barrel, im selling a brand new PVA 21" 308 savage prefit. I need to fund some other projects and this was a secondary barrel to my 260, so it can go. Small discount on price ($40), big discount on lead time haha
https://forum.snipershide.com/threa...shank-marksman-profile-prefit-21-308.6893411/
 

Attachments

Jul 29, 2014
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Closing the bolt almost felt assisted - similar to an assisted opening folding knife if that makes any sense. I can run this bolt faster than any other action ive tried because of it.
that how my mausingfield felt...until i added a trigger and then it went away
 

jmw

New Hide Member
Jan 24, 2018
1
0
1
Picked mine up during lunch today (for those still trying to do vudoo math, i was order 245X and this serial number is in the 60s).

Obviously the machining & finishing work is top of the line. Im glad they kept the Mausingfield bolt knob. I think I got more purchase on the tear drop shaped bolt stop at SHOT rather than the knurled knob, but that could be because I was playing with my stripped action vs the JH rifle at SHOT. I wish the bolt lift was a bit lighter, but the short throw is slick. The thing that really got me is closing the bolt - I havent felt any action quite like it. This is defintiely the highest end action ive owned, but ive played with pretty much all of them at some point. Closing the bolt almost felt assisted - similar to an assisted opening folding knife if that makes any sense. I can run this bolt faster than any other action ive tried because of it. Can't find a single thing to complain about - even the serial number location is slick - very clean appearance. I too wish I wouldve ordered a 2nd, but in long action.

Unrelated, but if anyone has had enough waiting for a barrel, im selling a brand new PVA 21" 308 savage prefit. I need to fund some other projects and this was a secondary barrel to my 260, so it can go. Small discount on price ($40), big discount on lead time haha
https://forum.snipershide.com/threa...shank-marksman-profile-prefit-21-308.6893411/
The mausingfield action feels the same way when you close the bolt, it feels like it closes itself, very nice
 
Jan 23, 2014
96
30
18
Southern AZ
Picked mine up during lunch today (for those still trying to do vudoo math, i was order 245X and this serial number is in the 60s).

Obviously the machining & finishing work is top of the line. Im glad they kept the Mausingfield bolt knob. I think I got more purchase on the tear drop shaped bolt stop at SHOT rather than the knurled knob, but that could be because I was playing with my stripped action vs the JH rifle at SHOT. I wish the bolt lift was a bit lighter, but the short throw is slick. The thing that really got me is closing the bolt - I havent felt any action quite like it. This is defintiely the highest end action ive owned, but ive played with pretty much all of them at some point. Closing the bolt almost felt assisted - similar to an assisted opening folding knife if that makes any sense. I can run this bolt faster than any other action ive tried because of it. Can't find a single thing to complain about - even the serial number location is slick - very clean appearance. I too wish I wouldve ordered a 2nd, but in long action.

Unrelated, but if anyone has had enough waiting for a barrel, im selling a brand new PVA 21" 308 savage prefit. I need to fund some other projects and this was a secondary barrel to my 260, so it can go. Small discount on price ($40), big discount on lead time haha
https://forum.snipershide.com/threa...shank-marksman-profile-prefit-21-308.6893411/
I wish my PVA Barrel was etched where yours is. They etched mine 1/3rd down from the muzzle and makes for a issue with fluting it.
 
Mar 7, 2018
310
193
43
Arizona
Picked mine up during lunch today (for those still trying to do vudoo math, i was order 245X and this serial number is in the 60s).

Obviously the machining & finishing work is top of the line. Im glad they kept the Mausingfield bolt knob. I think I got more purchase on the tear drop shaped bolt stop at SHOT rather than the knurled knob, but that could be because I was playing with my stripped action vs the JH rifle at SHOT. I wish the bolt lift was a bit lighter, but the short throw is slick. The thing that really got me is closing the bolt - I havent felt any action quite like it. This is defintiely the highest end action ive owned, but ive played with pretty much all of them at some point. Closing the bolt almost felt assisted - similar to an assisted opening folding knife if that makes any sense. I can run this bolt faster than any other action ive tried because of it. Can't find a single thing to complain about - even the serial number location is slick - very clean appearance. I too wish I wouldve ordered a 2nd, but in long action.

Unrelated, but if anyone has had enough waiting for a barrel, im selling a brand new PVA 21" 308 savage prefit. I need to fund some other projects and this was a secondary barrel to my 260, so it can go. Small discount on price ($40), big discount on lead time haha
https://forum.snipershide.com/threa...shank-marksman-profile-prefit-21-308.6893411/
Agreed, the bolt feels wants to close. Disagree on the bolt lift, I love the short throw, but I can see how it could be a personal thing.

Anyone running the bolt seeing the cartridge snap into the extractor before you run the cartridge all the way in? Mine doesn't act as controlled round feed until it is almost in the chamber. I think that is one reason I'd say it likes to be run fast or with authority. I've never had a control round feed, so don't know exactly what to expect.
 

aard3

Private
Mar 23, 2011
36
2
8
34
Louisiana
Picked mine up today.... fit and finish is excellent, same as my Mausingfield. Love the short throw... I also don't find the lift heavy... it's nice.

Anyone have any idea when LRI is going to start selling their shouldered barrels?
 
Likes: hereinaz

lennyo3034

Gunny Sergeant
Apr 18, 2010
1,720
118
63
33
Southern MD
Impressions after running the three side by side:

It's not quite a fair comparison to compare a brand new action to well used ones. I also ran these dry only because the Nucleus is in 6 dasher and I don't have any loaded dasher ammo. That being said, the Nucleus is a damn nice action.

The Nucleus needs to be run with authority. I foresee it having issues if users pull back on the bolt too slowly. In order to activate the ejector, the bolt must be pulled back with some amount of force. Pulling the bolt too lightly or slowly causes it to just stop at the ejector. This may be something that just need to wear in however as I notice it getting better already. There is also some binding when the bolt is all the way back. I have determined this is a result of the extractor making contact with the receiver. This is not very noticeable when running the bolt fast. It is noticeable when running it slow. The extractor seems to be a floating design with no spring pressure on it keeping it in a consistent position. Here is the extractor and the marks from making contact with receiver can be clearly seen:

IMG_2702.JPG

The bolt lift is certainly heavier than the TL3. That's expected since the TL3 is a 90 degree action and known to have one of the lightest lifts made. I would say the bolt lift is on par with, if not slightly lighter than the RPR. This is actually a pretty close comparison as they are both 70[ish] degree actions and both have dual cocking cams. My RPR has a longer bolt handle than the Nucleus so the fact that the Nucleus may have edged it out is certainly a good thing.

When putting upwards pressure while trying to push the bolt forward, it is difficult and binds, similar to the TL3. I would say it doesn't bind quite as badly from upwards pressure as the TL3 does. With downward pressure, they both run well, with the smoothness going to the TL3. The RPR runs regardless of what direction the bolt is pressed.

As far as the bolt moving forwards and backwards goes, the TL3 is easily the smoothest. The RPR bolt makes contact with a lot points within the receiver. While I wouldn't call it "rough", I would describe it as "bumpy". The Nucleus is similar in that respects but not quite as bad as the RPR. The aforementioned binding with the extractor does not help.

Bolt close is very different between the three. The TL3 closes with smooth even pressure. The RPR has a bit of resistance as soon as I start pressing down. As soon as I break that bump, the bolt snaps complete shut. The Nucleus seems to require me to push forward a bit while pulling down in order to get it to shut. I noticed in a few of hereinAZ's videos, he does not smoothly pull the bolt down and I am experiencing the same if I do not push forward while trying to pull the bolt down. There is a little plunger on a spring at the back of the bolt that is causing this. Not sure what purpose it serves. I think this is a non-issue if cycling the bolt quickly like in a match.

The RPR seems to require less effort to cycle back and forth. I can certainly cycle it faster than I can the Nucleus. The Nucleus is faster than the TL3, but my TL3 is a long action so no quite a fair comparison.

Tilt test. I'm not really a fan on this test, but I've seen come people conduct comparisons with it before. With the bolt fully open, I tilted the rifles downwards to see when the bolt starts sliding forward. I feel that there are a lot of other variables taken into account and that it's not a good test for action smoothness. The TL3's bolt was the first to move, requiring the least angle to do so. This was closely followed by the RPR. The Nucleus required a near 45 degree angle to get the bolt to move. I think this is in most part due to extractor binding.

Overall the cycling of the Nucleus is not bad, especially when running it fast. However it seems that this action NEEDs to be run fast to function. I will continue to cycle it and see if it breaks in more.
 
Apr 4, 2013
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The Nucleus seems to require me to push forward a bit while pulling down in order to get it to shut. I noticed in a few of hereinAZ's videos, he does not smoothly pull the bolt down and I am experiencing the same if I do not push forward while trying to pull the bolt down. There is a little plunger on a spring at the back of the bolt that is causing this. Not sure what purpose it serves. I think this is a non-issue if cycling the bolt quickly like in a match.
I noticed the same thing when closing the bolt slowly, at first I thought something was wrong because without that extra forward pressure it won't close. As you said, when running faster it just works better. It really does seem to want to run fast, and it feels smooth that way.
 
Likes: hereinaz
Feb 10, 2017
155
12
18
Impressions after running the three side by side:

It's not quite a fair comparison to compare a brand new action to well used ones. I also ran these dry only because the Nucleus is in 6 dasher and I don't have any loaded dasher ammo. That being said, the Nucleus is a damn nice action.

The Nucleus needs to be run with authority. I foresee it having issues if users pull back on the bolt too slowly. In order to activate the ejector, the bolt must be pulled back with some amount of force. Pulling the bolt too lightly or slowly causes it to just stop at the ejector. This may be something that just need to wear in however as I notice it getting better already. There is also some binding when the bolt is all the way back. I have determined this is a result of the extractor making contact with the receiver. This is not very noticeable when running the bolt fast. It is noticeable when running it slow. The extractor seems to be a floating design with no spring pressure on it keeping it in a consistent position. Here is the extractor and the marks from making contact with receiver can be clearly seen:

View attachment 6919826

The bolt lift is certainly heavier than the TL3. That's expected since the TL3 is a 90 degree action and known to have one of the lightest lifts made. I would say the bolt lift is on par with, if not slightly lighter than the RPR. This is actually a pretty close comparison as they are both 70[ish] degree actions and both have dual cocking cams. My RPR has a longer bolt handle than the Nucleus so the fact that the Nucleus may have edged it out is certainly a good thing.

When putting upwards pressure while trying to push the bolt forward, it is difficult and binds, similar to the TL3. I would say it doesn't bind quite as badly from upwards pressure as the TL3 does. With downward pressure, they both run well, with the smoothness going to the TL3. The RPR runs regardless of what direction the bolt is pressed.

As far as the bolt moving forwards and backwards goes, the TL3 is easily the smoothest. The RPR bolt makes contact with a lot points within the receiver. While I wouldn't call it "rough", I would describe it as "bumpy". The Nucleus is similar in that respects but not quite as bad as the RPR. The aforementioned binding with the extractor does not help.

Bolt close is very different between the three. The TL3 closes with smooth even pressure. The RPR has a bit of resistance as soon as I start pressing down. As soon as I break that bump, the bolt snaps complete shut. The Nucleus seems to require me to push forward a bit while pulling down in order to get it to shut. I noticed in a few of hereinAZ's videos, he does not smoothly pull the bolt down and I am experiencing the same if I do not push forward while trying to pull the bolt down. There is a little plunger on a spring at the back of the bolt that is causing this. Not sure what purpose it serves. I think this is a non-issue if cycling the bolt quickly like in a match.

The RPR seems to require less effort to cycle back and forth. I can certainly cycle it faster than I can the Nucleus. The Nucleus is faster than the TL3, but my TL3 is a long action so no quite a fair comparison.

Tilt test. I'm not really a fan on this test, but I've seen come people conduct comparisons with it before. With the bolt fully open, I tilted the rifles downwards to see when the bolt starts sliding forward. I feel that there are a lot of other variables taken into account and that it's not a good test for action smoothness. The TL3's bolt was the first to move, requiring the least angle to do so. This was closely followed by the RPR. The Nucleus required a near 45 degree angle to get the bolt to move. I think this is in most part due to extractor binding.

Overall the cycling of the Nucleus is not bad, especially when running it fast. However it seems that this action NEEDs to be run fast to function. I will continue to cycle it and see if it breaks in more.
That plunger at the back of the bolt, if I remember correctly, is what keeps the bolt shroud from rotating when out of battery. The Remington 700 accomplishes this by having a cutout at the top of the cocking ramp for the cocking piece to sit in when the bolt is open. It requires a concerted effort to move it from that "notch." The Nucleus doesn't have this at the top of the cocking ramp (neither does the Mausingfield, I think), and so that little plunger catches in its own cutout on the bolt body when the action is open to accomplish the same task.
 
Dec 21, 2009
235
47
28
30
Petersburg, WV
So are rounds sliding up into the bolt face under the extractor out of the mag? It seems that different mags whose feed lips are different lengths can change where the round pops up.
 
Mar 7, 2018
310
193
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Arizona
I think we are all having the same experience, describing some of the same things. I don't think there was anything I would disagree with above.

As I cycle it more, it is smoothing out and I am getting used to it. It absolutely likes to be run fast, and to me that is a feature, not a bug. As soon as I stopped trying to "feel" the action and see what it was doing in the videos, and started running it in a shooting position like in a match, for speed and repetition, all the hicups went away.

This might not be an action that someone looking to sit at a bench and slowly feed rounds would necessarily make as a first choice. For a fast paced match, I see no downsides. My Savage would feed fine off the bench, running slowly. But, as soon as I got to a match, running it fast, I'd have issues staying on target, running the bolt fast, and feeding. So far, the Nucleus solved that, so I am a happy camper.

Afkirby, I will try a Magpul and Accurate mag tomorrow at the range and report.
 

steve123

Lt. Colonel
Mar 16, 2008
7,290
252
83
Flagstaff, AZ
Just some quick mentions...

I shoot 6x47 in my Mausingfield, the OACL is shorter than the longer cartridges. I took a .050 off the front of the lips of my AI mag so now the extractor groove of the case slides into the extractor as the cartridge pops out of the mag and is much smoother than before. It feeds like butter now, actually the best I've seen.

You guys could experiment with lighter firing pin springs. My Mausingfield had a strong spring which made the cocking effort stupid hard. I clipped off one coil which made the cocking a little lighter but feels much better and have had no ignition problems. I figured worse case was just ordering different spring strengths if my solution didn't work.

I'm at high 2700's so maybe next shipment.

Thinking hard about trying a 25 Dasher! 25" barrel with 125gr bullets, 2.5 twist barrel to stay with the theme, just JK on the twist, i'll do 7 twist and 131's if I go for it.
 
Nov 16, 2011
548
31
28
Kennerdell PA
Got my nucleus yesterday threw a fresh coat of elite sand cerakote on it this morning. Bought for the wife to start shooting and she wanted robins egg blue but I told her I couldn’t get caught shooting a blue rifle haha. Overall it’s a solid action from what I can tell. Wife should be happy with it

You can see a few threads on a shilen savage prefit. Not a big deal to me but it might bother some. Now I just need to find a mpa chassis for it

67F220CA-B03B-4F7A-A985-A701E2CD464A.jpeg C64C364D-E571-44A3-9F1F-88B1BCE6C722.jpeg 4B0F4B2F-C165-4F69-83AE-61850C0F37CC.jpeg
 
Jan 21, 2012
46
16
8
53
I'm jealous of you guy's that have received your action's. I shouldn't have to wait much longer,my invoice is 2495 so I'm getting close to getting it.
 
Mar 7, 2018
310
193
43
Arizona
Shot my Nucleus today a little. I would disagree with running with authority, it ran great even slow. I think it is more important to run it harder forward than rearward.
I shot mine too. Yes, running it forward is where you need to give it a little more. You certainly don't need a lot of force. You can't baby it forward is what I would say.

Mine shot these group at 200 yards with some handloads I threw together this morning, so I gotta say I'm very happy.

There is nothing that bothers me about the action. I can't believe how much difference the shape of the bolt knob makes. 20180707_102309.jpg 20180707_102307.jpg
 
Apr 4, 2013
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I shot mine too. Yes, running it forward is where you need to give it a little more. You certainly don't need a lot of force. You can't baby it forward is what I would say.

Mine shot these group at 200 yards with some handloads I threw together this morning, so I gotta say I'm very happy.

There is nothing that bothers me about the action. I can't believe how much difference the shape of the bolt knob makes. View attachment 6920106 View attachment 6920107
Nice! I'm kind of jealous of you guys that can shoot yours. I'm just waiting on an action wrench. :)
 

lennyo3034

Gunny Sergeant
Apr 18, 2010
1,720
118
63
33
Southern MD
Nice! I'm kind of jealous of you guys that can shoot yours. I'm just waiting on an action wrench. :)
My Rifle is ready to shoot. But I can't shoot it because apparently Norma dasher brass requires a special shell holder. And the only place to get it was bullets.com which is going out of business.
 
Mar 7, 2018
310
193
43
Arizona
im actually having more issues with the arc than any other. the winner with mine with 6.5x47 lapua is by far the magpul mags. it push feeds half the time with the arc mags unless im running it fast.
I am getting the feeling that Magpul mags are gonna be the winner with my 6xc. The Accurate mag was running fine, something just seemed better with Magpul mags. I'll have to look at it closer now that you mention it as well.
 
Likes: jgs8163
Mar 25, 2017
12
0
1
Can anyone provide the action ID to 0.001”? I need to order a rod guide from PMA Tool and I’m guessing it’s not a standard dimension. Thanks!
 
Feb 18, 2017
600
97
28
Albuquerque, nm
I'm 2499 and have a short and long action lefty. Pretty sure I'm gonna get screwed. Lefty's always do.
Yeah I'm low 2400s waiting on a lefty. Good news is they're working the now. Last quote I heard was 3-6 weeks but that was a week ago. I'm just planning on late September and if it arrives earlier ( with barloc) I'd be happy! Awesome thing is arc didn't wait to fill left hand orders until the very end. The wait could have been much worse
 

lennyo3034

Gunny Sergeant
Apr 18, 2010
1,720
118
63
33
Southern MD
Agreed, the bolt feels wants to close. Disagree on the bolt lift, I love the short throw, but I can see how it could be a personal thing.

Anyone running the bolt seeing the cartridge snap into the extractor before you run the cartridge all the way in? Mine doesn't act as controlled round feed until it is almost in the chamber. I think that is one reason I'd say it likes to be run fast or with authority. I've never had a control round feed, so don't know exactly what to expect.
I took a video of mine doing the exact same thing. I don't have a youtube account, can I text it to you to post? If you don't mind, please send me a PM.
 
Dec 21, 2009
235
47
28
30
Petersburg, WV
Did I see somewhere Ted mentioning that he was going to do an extended rail that limiting the rotation of the barloc when tightening it? It looks like the barloc is shaped for it, there just needs to be some protuberance that would prevent it from rotating.
 
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