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 New barrel or load?
#5726444
05/02/15 09:40 PM
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Joined: Jul 2013
Posts: 2,778
Gone to Texas
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Finally got my new 6.5 Creedmoor together. I did some load development yesterday and it is shooting 1/2 inch at 100 yards with a couple loads but none shot 1 hole. Could be me, but I have shot 1 hole groups before.
I'm shooting a brand new CBI barrel, only 50 rounds down it, will the groups tighten up after firing more rounds? Or should I tune my loads OAL or powder charge a bit?
Shooting the 140 Amaxs over H4350.
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Re: New barrel or load?
[Re: Gone to Texas]
#5726519
05/02/15 10:59 PM
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Joined: Apr 2010
Posts: 6,219
dee
THF Trophy Hunter
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Joined: Apr 2010
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Clean?
I'd put a few more down it to see where it is. Most will definitely speed up and some will settle more in accuracy as well.
"A vote is like a rifle; it's usefulness depends on the character of the user" Theodore Roosevelt
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Re: New barrel or load?
[Re: dee]
#5726627
05/03/15 12:48 AM
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Joined: Jul 2013
Posts: 2,778
Gone to Texas
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Clean?
I'd put a few more down it to see where it is. Most will definitely speed up and some will settle more in accuracy as well. Yeah it was bran spanking new. I ran a patch of bore shine down it. This is my first new aftermarket barrel so I didn't know if it needs a lot of rounds fired through it before it settles in accuracy wise.
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Re: New barrel or load?
[Re: Gone to Texas]
#5726698
05/03/15 02:03 AM
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Joined: Dec 2008
Posts: 41,164
J.G.
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Don't clean it anymore.
Seat the bullet even with the lands (as long as it still fits in the mag) , start at 41.5 gr of H-4350 and work up in .3 increments to 43.0 gr. It'll shoot somewhere around 42.0 but check them all. Once you find the powder charge thay does the best THEN play with jumping the bullet. A-maxes are not known to be sensitive to the jump but you can test it if you like. Testing all this 200 yards to 500 yards will tell you more. Testig at 100 may have you measuring groups in thousandths instead of 1/16" or 1/8". For really good barrels 300 yards can be hard to read. 500 is better provided you don't have a ton of wind.
Oh and a routienly shooting 1/2" rifle is not a problem at all. In fact that's really good, and "single holes" are not super common.
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Re: New barrel or load?
[Re: J.G.]
#5726778
05/03/15 03:20 AM
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Joined: Jul 2013
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Gone to Texas
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Don't clean it anymore.
Seat the bullet even with the lands (as long as it still fits in the mag) , start at 41.5 gr of H-4350 and work up in .3 increments to 43.0 gr. It'll shoot somewhere around 42.0 but check them all. Once you find the powder charge thay does the best THEN play with jumping the bullet. A-maxes are not known to be sensitive to the jump but you can test it if you like. Testing all this 200 yards to 500 yards will tell you more. Testig at 100 may have you measuring groups in thousandths instead of 1/16" or 1/8". For really good barrels 300 yards can be hard to read. 500 is better provided you don't have a ton of wind.
Oh and a routienly shooting 1/2" rifle is not a problem at all. In fact that's really good, and "single holes" are not super common. Thanks, I am going do that this week. To be honest, it's probably me shooting poorly and not the rifle or the round!
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Re: New barrel or load?
[Re: Gone to Texas]
#5726950
05/03/15 01:25 PM
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Joined: Nov 2012
Posts: 15,639
QuitShootinYoungBucks
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3 or 5 shot groups? Nothing wrong at all about a 1/2" 5 shot group. Foul it up and keep shooting, see if it tightens up some before you play too much
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Re: New barrel or load?
[Re: QuitShootinYoungBucks]
#5726970
05/03/15 01:49 PM
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Joined: Jul 2013
Posts: 2,778
Gone to Texas
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3 or 5 shot groups? Nothing wrong at all about a 1/2" 5 shot group. Foul it up and keep shooting, see if it tightens up some before you play too much Just 3 shot groups.
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