Doug M.
Member
I've seen that reported somewhere, but I can't recall for sure where. It was a couple of years ago. I suspect it was on the 10-8forums, which are closed up now.
Has anyone taken a micrometer and measured a new round, then chambered and rechambered that same round a couple of dozen times and then remeasured the round to see how much, if any, bullet setback there really is?
Would make an interesting experiment and would put to rest this argument/discussion.
The SD ammo in my pistol gets sent down the range at the beginning of each range visit. Then use range ammo for the remainder of the session. Later, after cleaning, it gets loaded up with fresh SD ammo.
I did just this.
I rechambered a Speer Gold Dot 230 grn .45, a Win PDX1 230 grain, and a reloaded 230 grain LRN 10 times each, measuring each beforehand.
The reload setback .1 inch, which I expected with used brass. The Gold Dot also set back .1 inch, which was a bit surprising. The PDX1 didn't budge.
All were run thru my Glock 30, so it depends on the manufacturer, I suppose. I don't concern myself over .1 inch of setback, being more concerned with damaged cases or bullets.