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264 WM w/140 AMAX load advise

 
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  #1  
Old 03-08-2011, 07:45 AM
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264 WM w/140 AMAX load advise

Anyone out there got any good loads with a 140g AMAX from a 264 with H4350, H4831sc, or H1000? I like to stick with "H" powders for temperature and lot to lot consistency.

RIfle is new, but an older winchester model 70 XTR with a 1 in 9" twist. I dont think the twist is the problem as its leaving round holes out to 600 yards, and its shot a .4" group at 100 yards, however next time out and everytime after that, its shot no better then 1.5" at 100. This was with 67.5g H1000.

If I cant get the 140 AMAX to shoot very well consistently, then I think I'll move down to the 123g AMAX or 120g NBT.
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Old 03-08-2011, 08:40 AM
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Re: 264 WM w/140 AMAX load advise

id be sticking with the 140s with that cartridge. id also be trying r22 and 7828 and work on getting good 300 yd groups.
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Old 03-08-2011, 08:54 AM
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Re: 264 WM w/140 AMAX load advise

I would get some Retumbo powder. I have not tried the 140 Amax in my 264 WM but with the 130 Accubond I get super velocity 3350 fps and very good consistent accuracy. I have a 27 3/4" Shilen barrel. I was reading in the Hodgdon annual manual and they seem to think that Retumbo is THE POWDER for the 264 win mag. I have to agree with them.
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Old 03-08-2011, 09:38 AM
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Re: 264 WM w/140 AMAX load advise

Id really like to stick with the 140 amax due to the BC and cost/performance, but if they wont shoot consistently, then I need to look elsewhere.

I like Rl22 as its usually been a very accurate powder for me, I just really HATE how inconsistent it is from lot to lot and with temp sensitivity issues.

I've never had much luck with 7828 in several different calibers over the years either.

Might have to pick up some Retumbo to try out. Adds another 100fps over H1000 and 7828, RL22 etc, in the 130g and 140g weight, and its also an "H" powder so thats good thing.
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Old 03-09-2011, 02:12 AM
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Re: 264 WM w/140 AMAX load advise

yup other than h870, retumbo has been the best in my 264 but i shoot 140gr bergers.
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Old 03-09-2011, 08:51 AM
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Re: 264 WM w/140 AMAX load advise

I am not sure how you have your bullet seated but I had very inconsistent results with A-maxes seated near the lands. I pulled them back to about 0.060" away and they started to shoot very consistently, both groups and ES. Just a thought.
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Old 03-09-2011, 11:10 PM
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Re: 264 WM w/140 AMAX load advise

Quote:
Originally Posted by 6.5 mag View Post
yup other than h870, retumbo has been the best in my 264 but i shoot 140gr bergers.
What was your starting and end charge with the 140gr Berger?
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