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Posted: 9/11/2012 11:29:22 AM EDT
| Was running some drills this weeken with a 3gun rifle and things seemed ok with good ammo at distance. I had a small break of about 20 min then started doing hoser drills on paper. I was running Wolf on the close paper. Went to paste targets and had about one third of them keyhole big time. The distance was only 10yrds. Put the came ammo in two different guns with no keyholing. Then put some Aguila in the rifle which also didn't keyhole. Is the keyholing with Wolf a sign of a soon to be shot out barrel. I dont want to travel to a match and have the barrel crap out with even good ammo. Round count is around 4k on a 18inch Compass Lake Engineering barrel |
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Quoted:
Was running some drills this weeken with a 3gun rifle and things seemed ok with good ammo at distance. I had a small break of about 20 min then started doing hoser drills on paper. I was running Wolf on the close paper. Went to paste targets and had about one third of them keyhole big time. The distance was only 10yrds. Put the came ammo in two different guns with no keyholing. Then put some Aguila in the rifle which also didn't keyhole. Is the keyholing with Wolf a sign of a soon to be shot out barrel. I dont want to travel to a match and have the barrel crap out with even good ammo. Round count is around 4k on a 18inch Compass Lake Engineering barrel Probably a combination of factors....fouling, grain vs barrel twist rate vs underpowered ammo on Wolf (velocity issues, flight precess), temperature, inconsistent batch of Wolf, etc....But I don't believe it is shot out. You would have noticed a gradual drop in accuracy way before it began to keyhole if it were shot out. |
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I highly doubt shot out especially if you are chrome lined. I can't speak for an AR mine simply doesn't have that high of a round count yet but, I had an AK growing up that had countless dumps through it doubling the round count you mention and stayed hot without frying a barrel. A bore scope would give you a good idea of what is happening in the throat.
Shannon |
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Before giving up on the barrel, use Sweets solvent to clean all the copper out of the barrel bore.
Sweets is ammonia based,so it does not take a lot of scrubbing to get all the copper fouling out of the rifling (just keep cleaning until you are not longer pushing out blue on the patches). Also, might be time to pull the FS and get the crown clean as well. If after this, and you are still getting key holing with a few different ammo's, then it might be time to suspect something has gone wrong, and have someone double check the barrel, and even FS for bullet strikes before calling the barrel gone. |
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