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Extreme spread has me pulling my hair out.

 
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  #1  
Old 11-02-2013, 05:38 PM
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Join Date: Dec 2010
Location: Booneville, Ar
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Extreme spread has me pulling my hair out.

Hey fellas, I have tried for over a year to control my es in my 25-06 and can't seem to get a handle on it.
I load my rounds while watching Defensive edges, reloading for long range hunting and do it step by step.
I am reloading 115gr berger VLD's in winchester brass using 54gr of H4831sc and using federal large rifle match primers.
Each bullet is weighed and measured for consistincy. All brass is sized using Reddining s bushing dies and seated with the redding micrometer seating die. All brass is fire formed then then head spaced .002 less, then trimmed using the sinclair mirometer trimmer then cleaned using the stainless steal tumbler to clean well inside and out. All powder is twice measured to an exact 54gr. all OAL are measured to exactly 2.707, I am setting .020 off of lands and I still have horrible es. I even sort my brass by how often it is fired. As an example I went out last week and shot 6 rounds and the read as follows. 2996,2911,2936,2943,2930,2969 All were measured with my Competetion Electronics Prochrono. My only consistency in es is inconsistency. Please help. Thank's, Brad
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Old 11-02-2013, 05:42 PM
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Re: Extreme spread has me pulling my hair out.

Shoot a couple groups at 600 + yards and measure the vertical spread. Many chronographs are known to lie. The proof is in the pudding.

Jeff
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Old 11-02-2013, 06:10 PM
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Re: Extreme spread has me pulling my hair out.

Quote:
Originally Posted by Broz View Post
Shoot a couple groups at 600 + yards and measure the vertical spread. Many chronographs are known to lie. The proof is in the pudding.

Jeff
If not lie, at least buried in the fine print. If I looked at the right chrony, it's listed as +/- 1%. Approximately 60 fps spread is within the advertised tolerances of the device at 3000 fps.

You didn't mention if you're annealing case necks?
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Old 11-02-2013, 06:26 PM
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Location: Greencastle, PA
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Re: Extreme spread has me pulling my hair out.

you could try some magnum primers or a slight increase in powder charge. If I remember correctly my favorite load with that powder and bullet was 54.3 with a fed 215 match primer. I never checked the speed but elevation was under 1/3 moa out to 700 yards.
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Old 11-02-2013, 07:21 PM
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Join Date: Dec 2011
Location: Michigan
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Re: Extreme spread has me pulling my hair out.

Quote:
Originally Posted by Broz View Post
Shoot a couple groups at 600 + yards and measure the vertical spread. Many chronographs are known to lie. The proof is in the pudding.

Jeff
+1 on that. See if it shoots. If not, start changing components one at a time to see what changes. Based on the attention to detail you are describing, I'm guessing it is not a "you" problem.

Are those 6 shots in succession, starting with a clean, cold bore?
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Old 11-02-2013, 07:23 PM
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Location: Booneville, Ar
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Re: Extreme spread has me pulling my hair out.

I'll have to look at my target from last weekend ( left it at work)for verticle but as I rember I got about a perfect triangle at 566 yds giving .6 moa
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  #7  
Old 11-02-2013, 07:26 PM
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Join Date: Dec 2010
Location: Booneville, Ar
Posts: 290
Re: Extreme spread has me pulling my hair out.

I computed my velocity at 2938 on the br2 range finder and shooter app and was real close on the shots from 400yds and 566yds. If a chrony ain't no better than that what good are they? Brad
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