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270 Winchester Ackley Improved

 
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  #15  
Old 01-25-2011, 02:42 AM
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Re: 270 Winchester Ackley Improved

Looking forward to hearing how it went!
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  #16  
Old 01-25-2011, 09:51 AM
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Join Date: Sep 2004
Location: Nevada
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Re: 270 Winchester Ackley Improved

Quote:
Originally Posted by darndt View Post
I will have my 270 ai build back next week. Going start load work with rel 22 and 7828 and 130 and 140 pills
I've found R-22 and Imr 7828 worked the best with large rifle mag primers like CCI 250

130's don't have a good BC but they go pretty good with R-22 62 gr. 140 SPBT's 60 gr of R-22 and 150's with 58 gr The 7828 again with the mag primer uses about 1.5 grains more for each respective pill weight.

Of course start a couple of grains less on the powder and work up to these amounts.
__________________
.270 Ackley improved 29 inch 1.250 dia. target barrel 7mm STW 28 inch 1.250 target barrel. I also love my .458 mag for varmints and the biggest game in the world.

Last edited by budlight; 01-25-2011 at 12:38 PM.
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  #17  
Old 01-25-2011, 10:04 AM
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Join Date: Dec 2008
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Re: 270 Winchester Ackley Improved

maybe i will stick to the 140s and 150s then. thanks for your advice.
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  #18  
Old 01-25-2011, 12:34 PM
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Re: 270 Winchester Ackley Improved

Quote:
Originally Posted by darndt View Post
I will have my 270 ai build back next week. Going start load work with rel 22 and 7828 and 130 and 140 pills
The .270 Sherman will give you a 5% capacity increase over the A.I. with the same parent case. It is nearly identical in capacity with the WSM. I don't have a .270 yet, but my 6.5 gets 3150-3200 with a 140 berger and a 26" barrel.....Rich
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  #19  
Old 01-25-2011, 01:01 PM
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Re: 270 Winchester Ackley Improved

I may have to go that route with my next one. I have another action sitting around. I was thinking a 6.5-06 ai but i am up to try anything. So the sherman would be similar to the gibbs correct?
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  #20  
Old 01-25-2011, 01:07 PM
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Re: 270 Winchester Ackley Improved

Quote:
Originally Posted by darndt View Post
I may have to go that route with my next one. I have another action sitting around. I was thinking a 6.5-06 ai but i am up to try anything. So the sherman would be similar to the gibbs correct?
It is nearly identical to the Gibbs in capacity but is a far better design. Longer neck, less body taper and sharper shoulder....Rich
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  #21  
Old 01-25-2011, 01:08 PM
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Join Date: Sep 2004
Location: Nevada
Posts: 593
Re: 270 Winchester Ackley Improved

Quote:
Originally Posted by elkaholic View Post
The .270 Sherman will give you a 5% capacity increase over the A.I. with the same parent case. It is nearly identical in capacity with the WSM. I don't have a .270 yet, but my 6.5 gets 3150-3200 with a 140 berger and a 26" barrel.....Rich
Do you have a spec drawing of the sherman .277? With a tall drop tube I'm able to put in 65 grains of H1000 in my 270 winchester brass ai case. That is level to top. I have not done the grains of water. Using the standard new Win 270 case and H-1000 powder @60 grains is the most.

I shoot allot of rounds so I buy cheaper bullets for 98% of my shooting. The Sierra game king 150's (Spitzer Boat Tails) are a good choice

I also do the messy home moly coating.

Sierra Bullets - The Bulletsmiths
__________________
.270 Ackley improved 29 inch 1.250 dia. target barrel 7mm STW 28 inch 1.250 target barrel. I also love my .458 mag for varmints and the biggest game in the world.
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