Small pistol primers

I know there's not alot on here about 45 acp but I recently found something out that if you reload for it you should be aware of it. There's alot of factory brass coming through now with small primers instead of large like it's been for a hundred years. Brings your progressive press to a screeching halt! I have been using the same pile of brass for ages but recently got some newly fired brass from a relative and was very surprised to find this. Took me a while to figure out was going on.Just a warning,sort your brass carefully!

Well my friend, that is not a new thing.
That crap all started quite a while ago now, with the whole "Non-Toxic" movement.
The NT brass all has small primer pockets, because the primer is the source of the majority of the gasses that the EPA doesn't like in enclosed spaces. The small primers allow mfgr's to remain below EPA minimums for emissions.

If you really want your hair blown back, there is(was, now) actually 3different sized primers used in 45acp brass. The "medium" primer days are REALLY old.