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accuracy in load developement

 
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  #1  
Old 08-23-2009, 08:01 PM
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accuracy in load developement

At what point do you call it good for long range accuracy in load developement? I don't want to burn a barrel out in the process.
Doing load developement for my 300 JAZZ and am at .5 MOA groups at 500 yards, and .7 MOA groups at 725 yards. Have not gone farther in distance yet.
I plan on verifying this performance a few more times, but at this point I am thinking of just verifying my cold bore shots and trajectory and call it good.
I guess my question boils down to what is good group size at 500-1000 yards
Most of my spread seems to be verticle.
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Old 08-23-2009, 08:24 PM
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Re: accuracy in load developement

Before I call it good I have to know I can hit my intended target at the ranges I will be shooting. Obviously it takes a much more accurate load to hit a coyote with a 6" kill zone at say 800 yds than it does to an elk with a 18" kill zone.

I'd be happy shooting at anything with your load at 750 yds.

Chris
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Old 08-24-2009, 12:03 AM
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Re: accuracy in load developement

I usually play with load development somewhat constantly. Every year I pick a load to hunt with and sight in with that and create a drop chart... but I usually get bored or read about a better bullet combination, or do some fiddling with load development to try to get more consistancy. I have a tikka 300wsm I bought in 2007 and have around 600-700 rounds down the tube now. I also have a 22-250 I bought last summer and have about 700 rounds down it too with out one varmint hunt involved lol! I like to fiddle with load development to the point of it getting frustrating.
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Old 08-24-2009, 06:01 AM
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Re: accuracy in load developement

[QUOTE=trueblue;306028
Most of my spread seems to be verticle.[/QUOTE]

How much Jim?
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  #5  
Old 08-24-2009, 07:31 AM
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Re: accuracy in load developement

Joel,
My verticle is about 4.5-5" at 725 yards, and the horizontal about 3". It could be my shooting technic on handling recoil, or something in my reloading. Brass is annealed after every firing, full length resized, trimmed, uniform pockets, deburr flashholes, necks turned only to clean up thickness. I use a RCBS Chargemaster 1500 and double checked charge weight on a balance beam . Last night conditions were good for shooting, with know mirage, and a 2 mph wind. I did notice a slight difference in neck tension on a couple of rounds when seating the bullets, even with the necks turned to 0.0145 thickness. I was surprised by this, as I would have thought with the necks all the same thickness the seating of the bullet pressure would be the same.
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Old 08-24-2009, 09:45 AM
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Re: accuracy in load developement

Why do you reference your 'grouping' as if your long range 'accuracy'?
Is this benchrest or hunting?

If it's for hunting then I suspect you haven't actually begun load development.
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  #7  
Old 08-24-2009, 10:02 AM
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Re: accuracy in load developement

trueblue:

What's the velocity spread in your group?
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