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22-250AI vs IMR 4320,H-380,Varget,IMR 4064

 
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Old 09-05-2005, 10:17 PM
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22-250AI vs IMR 4320,H-380,Varget,IMR 4064

Useing IMR 4320 39gr behind 52gr Hornady A-MAX. Produced an average of 3860 for 1st 10 rnds with 3/4" groups at 100yds.2nd 10 rnds saome load produced 3,940 with really crummy accuracy. Last week with same load one group gave me .410. Not today Why all the inconsistances????? [img]/ubbthreads/images/graemlins/confused.gif[/img]
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Old 09-05-2005, 11:36 PM
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Re: 22-250AI vs IMR 4320,H-380,Varget,IMR 4064

In my .22-250, the 52 gr AMAX shoot at 4020 fps into 1/2 MOA groups out to 500m. Initially they chrono'd @ 3840 fps, but when I switched brass to the WW the velocity shot up to 4020 fps with no signs of pressure. I am shooting 37.5 gr Varget, Fed GM210M, WW brass. The gun is a Remington Varmint Special with 26" barrel.
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Old 09-06-2005, 03:48 PM
LB LB is offline
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Re: 22-250AI vs IMR 4320,H-380,Varget,IMR 4064

What's your twist? I suggest that you use a heavier bullet; therein lies your advantage with the Ackley. Also, give H414 a try.

Good hunting. LB
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Old 09-06-2005, 05:18 PM
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Re: 22-250AI vs IMR 4320,H-380,Varget,IMR 4064

[ QUOTE ]
What's your twist? I suggest that you use a heavier bullet; therein lies your advantage with the Ackley. Also, give H414 a try.

Good hunting. LB

[/ QUOTE ] I'm shooting a Cooper Classic with 1 in 14 twist. H414 ha? Ok well what the heck I'll try it.
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Old 09-06-2005, 07:29 PM
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Re: 22-250AI vs IMR 4320,H-380,Varget,IMR 4064

IronWorker,
all of the powders that you listed work great in a 22-250 but in an A.I. you need a slower powder. I have 2 right now and have had others in the past. one of my rifles likes imr 4831 w/55gr bal.tips and the other likes n160 w/55gr bal.tips. of the powders you listed scratch H380 off the list if you work up a load in 50 degree weather and try that same load in 80 degree weather you might have to post back in braille . I'm not kidding, after all my years of reloading I have never found a more volitle combination than H380 and a 220 swift or a 22-250AI , it works great in a standard 22-250 though. like others have said try H414 but even slower is worth a try. sorry for my bad grammar it is actually volatile. try imr4831 and report back.
UB
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Old 09-06-2005, 09:16 PM
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Re: 22-250AI vs IMR 4320,H-380,Varget,IMR 4064

Several shooters have warned me about H-380.I have too much to lose to not heed your warning.Dang several have suggested Varget. I'll try H-414. One week IMR 4320 worked great next week it didn't.Maybe I'm making mistakes on the shooting bench I'm unaware of!!!! [img]/ubbthreads/images/graemlins/confused.gif[/img]
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Old 09-06-2005, 10:54 PM
LB LB is offline
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Re: 22-250AI vs IMR 4320,H-380,Varget,IMR 4064

Were I you, I would forget 55 grain bullets and look at the 62, or 64 grain Berger, (not MEF) and absolutely use H414. Myself, I run a 65 grain Starke HP with 44.0 gr. of H414 at 3925fps. You may not get that high level, but whatever you do get, your 400+ yard performance will put almost any 55 grain bullet, at higher MV velocity, to shame.
Good advice.

Good hunting. LB

The 65 Starke is not a stock item. Clint made them special for me, maybe he will do it again? It wouldn't hurt to ask. They would be worthwhile.
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