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150 gr load for 270 wsm

 
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  #8  
Old 01-26-2011, 12:12 AM
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Re: 150 gr load for 270 wsm

I had the same results as bigngreen accept for the bergers I had to back them down to get the accuracy and to hold together at 3360 they would look like a shot gun pattern on paper I had to back them down to 3291 to get accuracy other than that they worked great on game my barrel is a #4 27" lilja my next test is the matrix ballistics 175gr bullets there a little bit heavy than the wildcats but with the same bc and marshal is great to deal with i put my order in today and they shipped today

Last edited by pitbull320; 01-26-2011 at 12:18 AM.
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  #9  
Old 01-26-2011, 12:00 PM
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Re: 150 gr load for 270 wsm

Quote:
Originally Posted by DontBlink View Post
Hello LRH,

I am just finishing up my long range rifle in 270 wsm. I am looking at reloading 150 grain bullets .
My 270 AI is similar in case capacity to the WSM. I predominantly shoot the Sierra 150 spitzer BT. I only use LR mag primers with these slower powders. I've tried powders as slow as Rel-25 and H-1000, I actually saw FPS reduction when compared to my Rel-22 and IMR 7828 loads
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  #10  
Old 01-26-2011, 12:17 PM
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Join Date: Nov 2008
Location: SW Montana
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Re: 150 gr load for 270 wsm

Quote:
Originally Posted by pitbull320 View Post
I had the same results as bigngreen accept for the bergers I had to back them down to get the accuracy and to hold together at 3360 they would look like a shot gun pattern on paper I had to back them down to 3291 to get accuracy other than that they worked great on game my barrel is a #4 27" lilja my next test is the matrix ballistics 175gr bullets there a little bit heavy than the wildcats but with the same bc and marshal is great to deal with i put my order in today and they shipped today
I ran the 140 Bergers at 3300 for accuracy but if I ran them up they would walk all over the place, nice to know it wasn't just me
I'm jacked about the Matrix bullets, I have a box of 165's that are dieing to get shot, but I'm sure my current barrel won't stabilize them so I'll have to wait a little longer. Matrix Ballistics have some 150's that might be good to look at, bonded rebated boat tail.
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  #11  
Old 02-03-2011, 11:23 PM
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Join Date: Apr 2004
Location: Brisbane, Australia
Posts: 48
Re: 150 gr load for 270 wsm

DontBlink,

This may not be strictly according to your initial question.

I am a long time 270 fan. I have a 270 Win in a Winchester pre 64 M70 fwt and it just loves the Hornady 140gr SPBT Interlocks (stock # 2735) But it is fussy with most other bullets, particularly the SSTs. I developed a load for a New Zealand Tahr and Chamois hunt in 2010 pushing the 140 gr out of my 22" barrel at 3,044 fps (chronographed in May, winter here). These bullets are awesome with good BC (for their type) of 0.486. They are a soft bullet so they open rapidly but the interlock feature holds them together.

They accounted for both Tahr and Chamois. TheTahr shot at 300 yards and the Chamois 200 yards in the NZ southern alpine area.

As you'll see for the following photo of my Chamois, shot at around 4,000 ft on a downwards (30⁰) slope, a sholder shot exiting in the other side chest area evidenced nice expansion. A one shot kill.



I was concerned before the trip that the 140 gr interlocks might have been a bit too much of a bullet for the small frame of the Chamios, but this was not the case.

I have since been doing some paper ballistics on the 270 WSM (my protégée has one of these in mind) as a long range hunting rifle. With 180 gr Woodleigh bullets with a BC = 0.513. The following is the print of this out of the PointBlank ballistics software:



I trust this assists.

Cheers and God bless,
Magnum
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  #12  
Old 02-03-2011, 11:55 PM
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Re: 150 gr load for 270 wsm

Sorry for going a little OT here, but bigngreen, what kind of velocities were you able to get out of your factory barrel? I'm assuming its a 22" barrel.
Just wondering as I've shot a "published" max load of 64 gr of RL 22 with 140 gr AB and never saw over 3150.
No pressure signs, but didn't feel like pushing it.
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  #13  
Old 02-04-2011, 12:46 AM
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Location: SW Montana
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Re: 150 gr load for 270 wsm

Quote:
Originally Posted by BlackSS View Post
Sorry for going a little OT here, but bigngreen, what kind of velocities were you able to get out of your factory barrel? I'm assuming its a 22" barrel.
Just wondering as I've shot a "published" max load of 64 gr of RL 22 with 140 gr AB and never saw over 3150.
No pressure signs, but didn't feel like pushing it.
I have a factory 26 in varmint barrel on the model 12, I think with the slow powders like Retumbo and H1000 I was able to get more out of it, the Bergers ran 3300 and the Accubond 3341. I have a sporter factory barrel I was going to screw on to shoot for varmints so I don't burn up the new barrel so I'll see what I get out of a shorter barrel. In the 26in I was able to push the 140's into the mid 3400's with Magpro but could not find accuracy beyond what I was at with Retumbo. I've triple check these speeds with three other chronographs and my drop charts are right on.
I have three barrels for this rifle, the original 26 in which after shooting the throat out is running 3175fps, a 22in factory sporter which I haven't shot yet and a 28 in 1-9 twist Lawton that is awaiting chambering. I haven't tinkered enough to know at what barrel length your better of with the Retumbo burn rate or the 4350 burn rate. I load to what the pressure signs are showing, I push it but not so hard that I loosen primer pockets.
I don't know if the extra barrel is doing it, I will know when I screw on the sporter. I does seem that the 26-28 in length barrel is optimal for getting everything out of the 270 WSM case.
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  #14  
Old 02-04-2011, 08:50 AM
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Location: Idaho
Posts: 580
Re: 150 gr load for 270 wsm

dont blink
check your mag length before you get to thinking about bergers they like to be loaded long ,very close or into the lands
Most short mags I have seen have short boxs and would be impossible to fit them in. I have seen guys do a accubond load for in the mag and a berger load loading them single shot by hand
retiredcpo
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