10-03-2022, 12:06 AM
Dino, roger on all that for Lapua brass. I'm not a fan b/c of cost mostly (that's just me), but my thinking stems from his comment that the ridge formation occurs during sizing operation, post #6 above. The formation-stress is happening when the SB die is bearing down on the case. My take on the pics he posts is the brass kind of looks to me to have been squeezed down the case, like a SB die might do to it. Right at that case/web/wall interface or close to it.
Also I would think (not an expert on this) that early extraction or early unlock would be accompanied with extractor chew-marks/stresses on the rim. And maybe not so much with a 22" barrel, but I'm not expert on that either.
Certainly am open to other theories however.
Also I would think (not an expert on this) that early extraction or early unlock would be accompanied with extractor chew-marks/stresses on the rim. And maybe not so much with a 22" barrel, but I'm not expert on that either.
Certainly am open to other theories however.