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Joined: Jan 2005
Posts: 57,474
Campfire Kahuna
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Campfire Kahuna
Joined: Jan 2005
Posts: 57,474 |
Yep, that makes sense.
Crimping might not have even been the whole issue, it might be related to the load being just on the edge of going nuts, and not in a a harmonic sweet spot, that either say half a grain or a full grain eithe rway would have had the same results.
We can keep Larry Root and all his idiotic blabber and user names on here, but we can't get Ralph back..... Whiskey Tango Foxtrot, over....
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Joined: Aug 2002
Posts: 7,132
Campfire Tracker
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Campfire Tracker
Joined: Aug 2002
Posts: 7,132 |
Yeah, I agree. I'm still wondering if the 1st round were chambered from a locked back bolt instead of the charging handle if that would make a difference also with uncrimped bullets? Just something that upsets the first round like all of the rest that get fired in the group. I dunno, it's just a SWAG on my part though. Sometimes it's the little things that will frustrate the hell out of us. Most of the time it's my ability and not the rifle!
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Joined: Jan 2005
Posts: 57,474
Campfire Kahuna
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Campfire Kahuna
Joined: Jan 2005
Posts: 57,474 |
I thought the same thing until he confirmed that it did the same thing, hot or cold. Now that he says crimping has fixed the issue I doubt it was a stress related problem.
IMHO hot or cold, doesn't matter that much, stress is stress. You have it solved now, but you could have the barrel relieved and go back to non crimped and it could have also solved the problem. Or not.
We can keep Larry Root and all his idiotic blabber and user names on here, but we can't get Ralph back..... Whiskey Tango Foxtrot, over....
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Joined: Nov 2005
Posts: 3,507
Campfire Tracker
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Campfire Tracker
Joined: Nov 2005
Posts: 3,507 |
I had a GAP 10 and was getting lousy groups from 175g FGGM. At one point during my shooting session, I pulled a loaded round from the chamber and pulled the bullet out of the case in the process. The inertia from the bolt closure had moved the bullet forward into the barrel where it became stuck. (Just like a kinetic pullet puller.) For whatever reason, I had a batch of FGGM with inconsistent neck tension and was getting inconsistent COAL during chambering.
Solution: Once the gas system has been tuned, the solution is to crimp or increase neck tension.
Last edited by Grand; 08/26/15.
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