Quote:
Originally Posted by F75gunslinger
Before i knew what I know now I had a guy build me one with a long heavy barrel for varmint hunting.
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OK, if you have a precision made .223Rem chamber then I could see a difference. The shoulder of the 5.56x45 is slightly different. In a precision made chamber it could cause accuracy issues. Going from <1MOA to >6MOA seems extreme, but all guns are different. Most will not have issues like that. Maybe your chamber is tighter/looser than normal?
Also, turning into a single shot is weird. The chamber shouldn't affect that at all unless the cartridge is getting stuck. Or the chamber is so loose that a bunch of the gas is escaping past the casing as it's fired. That doesn't seem possible because the 60,000psi would just expand the brass enough to seal it up.
I don't know. You're the first I've ever heard of to have this issue.