I reload and shoot tens of thousands of rounds per year. I check every finished round in a gauge. I use a 100 round gauge that speeds up the process, it is machined to absolute SAAMI minimums, I get failures, but those I separate, check them with a barrel, and use them for practice. (Yes I do use a progressive) I spend quite a bit on travel, match fees, and expenses to ruin a trip due to bad ammo. The picture is of a failure.. That's a 9mm Makarov (9x18) that snuck past my inspection of the headstamps (I look at all of those too, there are brands I won't use) Every time I find one of these I start making comments about "Commie plots"
