I don't get any stretching at the head considering I only bump a few of thousands and the case length stays put, UNLESS I oversize, then the length changes. Splitting hairs about case HS, considering when you push back a shoulder in one direction the necks goes the other direction. I understand sizing brass to fit the chamber, but cases can be described as head spaced, that's what case gauge is for to measure case HS.
Never heard of chamber wear... other than throat erosion which isn't in the equation here Lyman. Increased HS happens from bolt locking lugs which a bit softer than receiver recesses.
If you wanna lock this thread be my guest, as far as I'm concerned this information really isn't necessary to improve my loading skills. But be a man , and accept the fact, that you don't have all the answers.
Last edited by milboltnut; 02-12-2022 at 05:39.
For whoever exalts himself will be humbled, and whoever humbles himself will be exalted.