300 PRC update

Merovingian

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What’s the gap between your bolt head and the back of your barrel?
I wish I could answer that with 100% confidence. However, best guess is Tennon 1.503 / Face to Receiver 1.635 so 0.132 +/- with case protrusion .128 +/-. Your question likely just cost me a proper depth mic. :cool: Either way, still just curious how many others are seeing this?
 

Merovingian

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Wow.....crickets. Was hoping for some wisdom on this one. Just got done loading seating depth ladders that will be 3x. If I break something I'll let you know.
 
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LakuNoc

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I'm pushing Hornady brass with over 80gr of Retumbo and a 230gr A-Tip....and I've never had that happen to me....

What's your trim to length?
What FPS you getting and whats your altitude?
 

b2lee

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I'm north of 3040fps and my altitude is about 934 or so feet. Temp was 70F...but MUCH colder now.....go me a coyote yesterday when it was 30F and a 35+mph wind....froze my nuts off...hit him with a 300BO though.

I need to see how much a 40F temp difference makes for Retumbo and the Italian stuff....but I hate being cold...heh
 
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NVScout

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Have you done any load development with the 225 eld?
I have not , to be honest I’m pretty anti-Hornady ..... I’m stuck with the brass until ADG finishes up and the Atips are the only bullet I would use from them. If they didn’t perform I was going to load the Berger’s
 
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Jmcmath

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Anybody got any speed numbers from a shorter barrel? I’m doing a 21” 30 magnum for a hunting rifle and wondering if I can get a 215 around 2750 with a can from prc
 

NVScout

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I was at sportsmans warehouse yesterday. Pick up and fondled a box of 230 Atips. So pretty! Lol. Wife was with me so put them back. She shit when she saw the price. I’ll have to go back solo.
We have a scheels where I’m at and they have been price matching powder valleys $71.06 price for me !
 

TripleBull

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It's hard for me to be too down on Hornady. I've got guns like an AR-10 that none of the Hornady factory ammo can touch the Federal GMM 168s, etc. But on the 300 PRC, the Hornady factory ammo has been pretty damn good. We broke the barrel in at a mile, quickly got on target and it shot consistently. Stepped out to 2400 yards, quickly got on target and it shot consistently. Hard to beat that with factory ammo.

I just picked up a box of A-Tips and look forward to working up a load although I admit I'd rather have better brass than that Hornady putty brass.
 
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jwknutson17

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Anybody got any speed numbers from a shorter barrel? I’m doing a 21” 30 magnum for a hunting rifle and wondering if I can get a 215 around 2750 with a can from prc
26 inch tube here... 215 berger at 2980 with 79.26 gr of H1k without pressure even though 1gr over max. I would say you should get it without issue. Only one way to find out, right?
 

Jmcmath

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26 inch tube here... 215 berger at 2980 with 79.26 gr of H1k without pressure even though 1gr over max. I would say you should get it without issue. Only one way to find out, right?
Yeah i just have a ton of 215s and a 10 twist rock creek and want to get full stability. Being at sea level I’m probably right on the edge.

2980 with a 26 is good. Makes me feel like I would be fine
 
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LakuNoc

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RL-26 right now. I have a stash of h-1000 but am using it on a 6.5 prc. I plan on changing to H-1000 or N570 for the 300 but can’t find it right now.
N570 is not temperature stable i would stick with H1000
 

LakuNoc

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I will be doing full review here with in a week on RCC brass. Will be receiving brass this week.
Will do full write up and review, if is anything like my friends RCC 338 brass it was better than 338 Lapua brass.
 

Merovingian

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I'm pushing Hornady brass with over 80gr of Retumbo and a 230gr A-Tip....and I've never had that happen to me....

What's your trim to length?
Trimming to 2.57" - Starts right above 2750 regardless of 200g or 230g pills. Didn't split a case on 3X despite pushing fairly hard (H1000 - 200s @ 3020 / 230s @ 2870). Hoping it's as simple as the brass. Can't wait for ADG to get up an running so I can find out, RCC just isn't in the budget. We already spun a 2nd barrel trying to resolve. Base to datum first one was on the long side of specs (2.21), new one is on the short side (2.197). Same brass sign on both, cut with two different reamers. Interesting Notes : 230 BHT's are better above .080 than below .020. 200 SMK's as expected .010 to .020. 230 SMK's truly need a 1:8. Obviously your results may vary.
 

kjnolder

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I have read all 36 pages of posts over the last couple days, super informative. I’m curious if anymore people have tried RL33 with the heavies. I saw the two posts that have and it really interest me. I run RL 26 with 156 Berger’s in my short barreled 6.5 Creed and get 2950 and it has me thinking what if a guy stuffs 85-90 gr of RL 33 into a PRC with a 250 A tip and see if it doesn’t give us 3000 FPS. I know it’s not all about velocity but if the node is there and SD and ES is single digit we have a winner.
 
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Ledzep

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I know of a guy that has tried RL33 with 250's and got pretty good speed but it wasn't as consistent as he'd have liked. May be dependent on the gun? A little tuning and trying wouldn't hurt.
 

DDRH65CM

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This is great! got an email from RCC making sure the Brass is up to my spec. I don't have a built rifle yet, but was concerned with neck OD (based on SAAMI chamber specs), it's within spec but may be a bit tight in the chamber.

The CAD/CAM engineer turned down the OD diameter some. Really good Customer service on their part.
 
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BCX

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I will be doing full review here with in a week on RCC brass. Will be receiving brass this week.
Will do full write up and review, if is anything like my friends RCC 338 brass it was better than 338 Lapua brass.
Better in what way?
 
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LakuNoc

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Better in what way?
It will hold higher pressure, primer pockets don't get lose as fast as lapua brass, his RCC 338 brass primer pockets are still good after 19 firings.
Also brass is more concentric internal volume measures exactly same within .05 measuring with H2O.
but as i said in earlier post i will be getting RCC brass for 300 PRC this coming up week and will do full test and review on RCC brass.
Also yes i paid for my brass with my $$$ which cost me around $600 for 100 pieces.
Will do review and will see if it will be worth.
 

DDRH65CM

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Also, would like add, they are willing to make the case to YOUR dimensions. Example above, the CAD/CAM engineer contacted me and sent me measurements to confirm before starting. Ended up thinning out the neck thickness a bit.
 

kjnolder

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Powder Valley just called. RL 26 on the shelves. 16 lbs coming my way. Give them a call.
 

b2lee

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I went to the range today to get the 308 ready for hunting season...and while I was there I decided to shoot some of my load developments for the 300PRC.

I decided to just do a 6 shot test looking for an accuracy node. I used the 225gr ELD-M's instead of the 230gr A-Tips because I have a few hundred ELD-M's that I'm not really going to use...but I can use them in these kinds of tests. I did NOT remember to take the chronograph since I more interested in simply getting the scope on the hunting rifle dialed in at 100yds and as a last minute thing decided to take the 300PRC for the load work up.

So, I did take a few retailed 225gr ELD-M's to see how much different in impact height it was from these work up loads...and to re-affirm Zero. First shot was within half a bullet of zero vertically..so it was good to go...wind was about 20mph right to left.

So fresh target....I shot in order of 75gr, 76gr, 77gr, 78gr, 79gr and 80 grains of Vihtavuori N565. My previous accuracy node using Retumbo on these 225gr ELD-M's was 75.5gr. As you will see...N565 and Retumbo...atleast in my rifle...acted very close to each other.

300prcvih.png

Looks like the VihtaVuori N565 is ready to play. That accuracy node at 75-77 grains looks really sweet. Probably load some up at 76 grains and work on some seating depths.......but I should be good to go with this load. Brass showed ZERO pressure signs. I'm wondering how far north of 80 grains I can go. Maybe another accuracy node up there with MORE speed... :)

One side note though.... The N565 was noticeably dirtier than ole Retumbo...which was surprising to me.

Edit: Bullet weight errors.
 

kjnolder

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Not that anyone cares, but a Hornady case will hold 95.0 gr of RL 33. I will try an ADG case when they arrive.

Why does this matter? Cause a 6.5 creed Lapua case will hold exactly 50.0 gr of RL 26 and push a 156gr at 3000fps with that 50gr of powder with no pressure and single digit SD. If science can do that, then it can push a 250gr A tip at 3000 FPS out of a PRC. I don’t know what the ballistics are on that, but it changes things.
 

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goinghunting

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Not that anyone cares, but a Hornady case will hold 95.0 gr of RL 33. I will try an ADG case when they arrive.

Why does this matter? Cause a 6.5 creed Lapua case will hold exactly 50.0 gr of RL 26 and push a 156gr at 3000fps with that 50gr of powder with no pressure and single digit SD. If science can do that, then it can push a 250gr A tip at 3000 FPS out of a PRC. I don’t know what the ballistics are on that, but it changes things.

You're running the 156 3000 with no pressure in a 6.5 Creedmoor? Or 6.5 PRC?
 
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b6graham

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Not that anyone cares, but a Hornady case will hold 95.0 gr of RL 33. I will try an ADG case when they arrive.

Why does this matter? Cause a 6.5 creed Lapua case will hold exactly 50.0 gr of RL 26 and push a 156gr at 3000fps with that 50gr of powder with no pressure and single digit SD. If science can do that, then it can push a 250gr A tip at 3000 FPS out of a PRC. I don’t know what the ballistics are on that, but it changes things.
This is bad advice
 

vergil

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I have a 28 inch Krieger barrel and Origin action, I can get around 2900 with RL 16 using Hornady 147 Eld's before seeing pressure signs, 3000 with 156's impressive nonetheless would love to know your setup.
 

LakuNoc

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I think lots of guys get carried away with FPS and how hot they can push the load, getting 3000 or 3100 FPS and maxing out 300 PRC.
IF you want to go faster get bigger cartridge 338, 375,416 or some others.
I will take 300 PRC shooting 80.06gr of H1000 powder and 230 A-tip traveling at 2935FPS and be stable from -10 Fahrenheit temp to 100 Fahrenheit and be very stable at any temperature. FPS will change 35FPS at most from very cold to very hot with H1000.
Where powders like N565 and RL22,17 Retumbo will Fluctuate up to 140FPS from -10Fahrenheit to 100Fahrenheit for example at -10 will travel 2900FPS and at 100Fahrenheit will travel 3050FPS. Someone like me shooting at long distance i try to stay away from those powders and i take slower H1000 but very stable at any shooting conditions.
Just my own test i did and my opinion not trying to start argument with anyone.
 

b6graham

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I think lots of guys get carried away with FPS and how hot they can push the load, getting 3000 or 3100 FPS and maxing out 300 PRC.
IF you want to go faster get bigger cartridge 338, 375,416 or some others.
I will take 300 PRC shooting 80.06gr of H1000 powder and 230 A-tip traveling at 2935FPS and be stable from -10 Fahrenheit temp to 100 Fahrenheit and be very stable at any temperature. FPS will change 35FPS at most from very cold to very hot with H1000.
Where powders like N565 and RL22,17 Retumbo will Fluctuate up to 140FPS from -10Fahrenheit to 100Fahrenheit for example at -10 will travel 2900FPS and at 100Fahrenheit will travel 3050FPS. Someone like me shooting at long distance i try to stay away from those powders and i take slower H1000 but very stable at any shooting conditions.
Just my own test i did and my opinion not trying to start argument with anyone.
Action size/options
Brass and powder cost

Powder cleanliness with cans especially
People who live in not such crazy climates
 

kjnolder

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I have a 28 inch Krieger barrel and Origin action, I can get around 2900 with RL 16 using Hornady 147 Eld's before seeing pressure signs, 3000 with 156's impressive nonetheless would love to know your setup.
I am running a 24” proof with defiance action. Running the 156 Berger’s with 49.5gr of RL 26. 6.5 creedmoor with magnum small rifle primers. I agree with everyone, accuracy over velocity.

What I meant in my post is that I am amazed at the science of powder and how it will change cartridge development in the future. For three years I loaded my Creed with H4350 because that’s what you are suppose to use. Then someone told me to try RL 26 and it completely changed everything. I am throwing out the idea that RL33 may be the cats meow for 300 PRC with heavy for caliber bullets, much like RL 26 is for the creed. In three weeks I will try it out and let everyone know. I will go in 0.5 gr increments up to 95 gr.
 
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Merovingian

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I think lots of guys get carried away with FPS and how hot they can push the load, getting 3000 or 3100 FPS and maxing out 300 PRC.
IF you want to go faster get bigger cartridge 338, 375,416 or some others.
I will take 300 PRC shooting 80.06gr of H1000 powder and 230 A-tip traveling at 2935FPS and be stable from -10 Fahrenheit temp to 100 Fahrenheit and be very stable at any temperature. FPS will change 35FPS at most from very cold to very hot with H1000.
Where powders like N565 and RL22,17 Retumbo will Fluctuate up to 140FPS from -10Fahrenheit to 100Fahrenheit for example at -10 will travel 2900FPS and at 100Fahrenheit will travel 3050FPS. Someone like me shooting at long distance i try to stay away from those powders and i take slower H1000 but very stable at any shooting conditions.
Just my own test i did and my opinion not trying to start argument with anyone.
2nd all that. Too many times shooting with people that can't find consistency beyond 500 and find out they're focusing on FPS not accuracy. No point in pushing 3000+ if you can't get it go where you want it to. I'm in CO where it can be 30 degrees at 7am and 70 degrees at noon so temp stable powders are in my opinion the only way to go. Finally, I've rarely found an accuracy node at the upper edge that outperforms alternatives. KJ if you're thinking about trying to push a 250 at 3000 out of the PRC, I anticipate you'll be wasting your time and money if not putting your platform at risk. But in all sincerity, I'm curious to see what happens as long as you do it safely.
 
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Merovingian

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It will hold higher pressure, primer pockets don't get lose as fast as lapua brass, his RCC 338 brass primer pockets are still good after 19 firings.
Also brass is more concentric internal volume measures exactly same within .05 measuring with H2O.
but as i said in earlier post i will be getting RCC brass for 300 PRC this coming up week and will do full test and review on RCC brass.
Also yes i paid for my brass with my $$$ which cost me around $600 for 100 pieces.
Will do review and will see if it will be worth.
What did you order your neck thickness at? Reason I ask is I'm having trouble keeping 230 BHT's below .75 but this happened after I turned the necks down to .014 (neck variance <.0005, neck runout <.001, concentricity <.001, ES 24). Thinking I maybe should have accepted the .003 variance but kept the lot closer to .016 / .340 OD. Oddly enough the 200 SMK's aren't exhibiting the same variance holding easily <.5 with a higher ES.
 

LakuNoc

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My neck thickness will be at .014 i will be using 230 A-Tip. Will tell you what happens later this week i will begin testing. Try different neck bushing put more pressure on it or try bumping powder up untill you reach max pressure. I find my node always right under max pressure. But again be careful, H1000 max is right about 80.6gr with 230 A tip and hornady brass and ES was under 10FPS. I’m at 1100 feet 40 F temp.
 
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Dippy

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@LakuNoc H1000 is tried and true. Accuracy, temp stable and typically available at most local and online suppliers. One of my favorite powders
 
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DDRH65CM

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Originally RCC had my spec at 0.017" neck thickness. But brought down to 0.014". I don't plan to neck turn