What cartridge for the Sierra 150 grain 6.5 bullet

Aug 26, 2017
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#1
What cartridge for the new bullet and why? I'm thinking about building a rifle around this bullet next. What do you all think?
 
Feb 9, 2013
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#2
If pure performance is your goal(not prs) I would guess a SAUM or 6.5-284 maybe? I would think those two would excel pushing that heavy bullet.
 
Aug 26, 2017
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#3
Yes, that is the decision to make. I'm guessing that a creedmore would not be able to push it fast enough to see any benefit. I have some cartridges in mind but I want to see what others think. I have no experience with the 6.5
 
Aug 26, 2017
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#4
And mercracing you named 2 of the 3 I was thinking of... I'd like to see3100-3150 fps with a 26" long barrel or so. I saw some loads with 140's that were in that fps range so I don't know if it's possible
 
Feb 9, 2013
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#5
I’m not nearly the smartest guy in the room, but I would think to see the awesome BC, you need speed. I’ve seen people run the numbers and they seem to be ok but I would think the two I listed would make that bullet shine if you push past, or right at the top of PRS speed.
 
Nov 6, 2013
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#7
If you don't mind the hassel with brass, 6.5 SAUM, you bet! Hellava cartridge!
http://www.gaprecision.net/ga-store/hornady-6-5-gap-4s-1000-count-5.html

With that bullet, one heluva combination! Key will be getting the rifle weight and muzzle brake together to mitigate the recoil.

Having watched ROs miss the call on a 6 Dasher hitting a big solid plate, this combination would make it very obvious when the round hits a target.

Getting ready to rebarrel a rifle, this may have just changed what it is going to be!
 

Pusher591

Gunny Sergeant
Jun 18, 2009
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#12
I’m not nearly the smartest guy in the room, but I would think to see the awesome BC, you need speed. I’ve seen people run the numbers and they seem to be ok but I would think the two I listed would make that bullet shine if you push past, or right at the top of PRS speed.
I thought the same thing but Sierra usually post stepped BC’s
and this one is no different. They are claiming a .713 BC if pushed 1760fps and faster (which is easily done in any 6.5 application) and a BC of .686 between 1240-1760fps. We will see but a lot of people doubted the 110 SMK but it’s proved to be exactly what is advertised so hoepfully this one will as well.
 
Likes: Pakinrax
Aug 26, 2017
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#14
My third choice was the 26 Nosler. That would be a long range steel rig and possibly hunting(with a different bullet). I guess there will be more discussion when the bullets hit the shelves.
 
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Feb 9, 2013
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#15
I thought the same thing but Sierra usually post stepped BC’s
and this one is no different. They are claiming a .713 BC if pushed 1760fps and faster (which is easily done in any 6.5 application) and a BC of .686 between 1240-1760fps. We will see but a lot of people doubted the 110 SMK but it’s proved to be exactly what is advertised so hoepfully this one will as well.
Those are very attainable speeds for any 6.5 to be sure. I only meant if you took your SAUM, .284, or Nosler and loded these you would be at a much greater distance before dropping to these speeds.
 
Aug 26, 2017
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#16
I was wondering why they didn't list BC's for higher speeds too? 1760 fps seems slow to get the max BC, right?
 
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lash

Swamp Rat
Sep 28, 2012
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#20
A question for those that know. How do the 6.5 Saum compare to say a .260 Rem as far as ease and speed of feeding? Single stack AI mag or AW okay?

I know that the obvious answer to the first question is that the steeper shoulder of the Saum is not a slick feeding as the 260, but actual experience is always helpful.
 
Apr 22, 2017
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#24
Jeff Brozovich over at Long Range Only is testing the new Berger 155 in a 6.5 creed and he is seeing benefits of higher BC out of the 6.5 creed at distance. Check out the thread over there.
I look forward to trying the new Berger or Sierra in my 6.5x284 as a hunting bullet.
 
Feb 14, 2017
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#27
Sierra tested them with a 260 Remington. I just got off the phone with them. They said a 1-8 twist would stabilize but the 1-7.5 would shoot inside of it all day.
 
Apr 22, 2017
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#30
I just built a 6.5x284 with a Proof 1:7.5 with the 150 and 155's in mind.
I'm getting .25moa with the 140 Bergers with the new Proof.
 
Feb 21, 2013
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#33
Bartlein will make any twist you request but the wait is 6-7 months. I just ordered a 7 twist for a 65 PRC to load the 150 Sierra and 155 Berger.
 
Oct 22, 2017
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#36
This is the bullet I'm having my 6.5 SAUM built for. I am hoping to use a Proof Carbon but they only cut the 24" Lite Sendero with a 1-7.5" twist. I just wrote back to them today hoping to get a special order of a 26".
 
Jun 6, 2013
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#40
I found they liked a bit more jump than I had originally started with 25 thou off was Money , I am going to run 60.5 Grains of
Retumbo which clocks in at 3080ish es of 8 and sd of 4.6 for 5. Shots.
 

Geno C.

Dirty Carnie
Oct 24, 2007
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#44
There's a guy on accurateshooter that tried to run them in his 6.5-284 and was blowing up bullets in a conventional rifled Krieger barrel. Sierra and Krieger worked together to figure the bullets won't take that speed with conventional rifling.

Other than him I don't know of anyone pushing them hard
 
Oct 8, 2012
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#45
I am getting 3156fps from my 26" Bartlein 1:8" in 6.5SS w. the 150 SMK. Ridiculously accurate round. They are hot for sure, right on the edge, but they are a laser beam. I have 4 loadings on some of my brass already.

Norma .300SAUM brass
RL26
CCI BR-2
150 SMK



 

Tjfarmer

Farmer Guy
Feb 15, 2017
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#46
I am getting 3156fps from my 26" Bartlein 1:8" in 6.5SS w. the 150 SMK. Ridiculously accurate round. They are hot for sure, right on the edge, but they are a laser beam. I have 4 loadings on some of my brass already.

Norma .300SAUM brass
RL26
CCI BR-2
150 SMK



This is good to hear, I’m building one right now with a 28” pipe. Was hoping for good results with the 150 smk. What coal length did you end up with and does the b.c. On the smk seem to hold up at distance
 

mijp5

Gunny Sergeant
May 7, 2009
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#48
I am getting 3156fps from my 26" Bartlein 1:8" in 6.5SS w. the 150 SMK. Ridiculously accurate round. They are hot for sure, right on the edge, but they are a laser beam. I have 4 loadings on some of my brass already.

Norma .300SAUM brass
RL26
CCI BR-2
150 SMK
What does your drop profile look like out to 1K with that rocket ship?
 
Oct 8, 2012
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#49
What does your drop profile look like out to 1K with that rocket ship?
250 yard zero. 7000' AMSL, 30*F Drops in inches & MILs
100 +1.7
150 +2.1
200 +1.6
250 0
300 -2.5 .2
350 -6.2 .5
400 -11.0 .8
450 -17.0 1.0
500 -24.1 1.3
550 -32.5 1.6
600 -42.3 2.0
650 -53.3 2.3
700 -65.9 2.6
750 -79.9 3.0
800 -95.4 3.3
850 -112.7 3.7
900 -131.5 4.1
950 -152.1 4.4
1000 -174.4 4.8
1050 -198.7 5.3 2095fps 1462ft-lbs About it for elk (actually @ 1020 to retain 1500ft/lbs)
1100 -225.1 5.7
1200 -283.9 6.6
1300 -351.6 7.5
1400 -429.4 8.5 1795fps 1073ft-lbs About it for deer and antelope
1500 -517.8 9.6
1600 -618.2 10.7
1650 -673.2 11.3 (furthest I have shot it so far @ 1656 @ 12.6MIL, drops have been spot on w. Shooter from 545 to 1656, but at 2000' AMSL & 65*F)
1700 -731.4 12.0
1800 -859.4 13.3
1900 -1002.9 14.7 (finally getting to 2nd rotation in my S&B PMII 5-25 DT)
2000 -1164.0 16.2
 

mijp5

Gunny Sergeant
May 7, 2009
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#50
so about 5.5 to 1000 with a 100 y zero, and 13.5 or so to a mile. That is unbelievable. You are crushing a 338