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A-max vs V-max

 
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  #1  
Old 04-01-2013, 08:21 PM
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Join Date: Feb 2012
Location: Upstate NY- Adirondacks
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A-max vs V-max

I had great results using 55 and 60 gr v-max bullets in my 223 and 22-250. Both would shoot sub 1" groups with my reloads.

Due to the shortages lately, I tried some 52gr a-maxes with the same charges and they seem to shoot radically different than the v-max bullets. I am using 25 grains of Varget in the 223 and 33 grains in the 22-250. Is it the twist of my barrels? The 223 has a 1 in 9 twist rate and the 22-250 has a 1 in 12.

The accuracy problems are the worst in the 223. Groups are shooting 4" to the left (consistently). The 22-250 is going high and to the left about 2". I switched back to the v-max loads and bang, right back on target. Any ideas?
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  #2  
Old 04-02-2013, 11:44 AM
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Re: A-max vs V-max

3 or 7 grains less bullet weight is pretty radical.

Boat Tail vs Flat Base. All sorts of influences.

More radical is the increased case capacity from the shorter bullet. Results in lower pressures and lower velocity.

If it were me (IIWM), I would start fresh and work up a load for the 52's.
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  #3  
Old 04-02-2013, 07:03 PM
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Re: A-max vs V-max

That makes sense. How much should I start increasing powder by? .5 grains? 5 shot groups of each?
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Old 04-02-2013, 09:57 PM
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Re: A-max vs V-max

Got a chronograph?
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  #5  
Old 04-03-2013, 07:46 PM
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Re: A-max vs V-max

No, but I might be able to borrow one. I will do some experimenting if I can ever get more primers and powder.
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