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Accuracy problems wby 30-378

 
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  #1  
Old 07-29-2013, 09:27 PM
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Accuracy problems wby 30-378

Have done everything that I can think of from copper fouling to set scews in inch pressure. I'm stumped. Can anybody offer any help. Working with Barnes 180 gr ttsx, h-50bmg, fed215m primers, wby mark 5 rifle. Thanks for any advice ahead of time.
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Old 07-29-2013, 09:39 PM
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Re: Accuracy problems wby 30-378

Loose the H50 BMG, I would go to 98 gr of H-1000 and a 210 Berger after a good cleaning with BoreTech Eliminator.

Or another good load is a 230 Berger and 94 gr of H-1000.

Seat both at 3.800" OAL

>>>>>> As always work up to this charge.<<<<<<<<<<

We have shot 1 moa or under with both loads at 1000 from factory Accumarks.

Jeff

PS: if this is a factory Accumark they always shoot better after bedding the Front Lug area.
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Old 07-29-2013, 09:57 PM
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Re: Accuracy problems wby 30-378

Thanks I will give those a try.
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Old 07-29-2013, 10:02 PM
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Re: Accuracy problems wby 30-378

I second what Jeff said...



--md
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Old 07-29-2013, 10:12 PM
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Re: Accuracy problems wby 30-378

Quote:
Originally Posted by Broz View Post
PS: if this is a factory Accumark they always shoot better after bedding the Front Lug area.
Hmmm, this might be why my groups are jumpy from 1/2 to 1 MOA with my .257 Wby Accumark. I mean, 1 MOA @ 100 is only 1 inch, so the groups are still fairly tight, but I think it could be better. Guess I'll take it to my smith and have him bed it while he's working on my other builds...
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Old 07-31-2013, 07:46 PM
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Re: Accuracy problems wby 30-378

Quote:
Originally Posted by Broz View Post

PS: if this is a factory Accumark they always shoot better after bedding the Front Lug area.
Could you post a pic of the beding of this rifle. I bought a use one and I'm not sure if it as been beded or not.

Thanks, Mart
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Old 07-31-2013, 07:50 PM
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Re: Accuracy problems wby 30-378

Quote:
Originally Posted by Salar600 View Post
Could you post a pic of the beding of this rifle. I bought a use one and I'm not sure if it as been beded or not.

Thanks, Mart
Take it out of the stock and look. They come with an aluminum bedding rail in the stock that fits like a sack on a sow. If there is bedding compound around the front lug area somone has bedded it. If it is all aluminum it needs bedded.

Jeff
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