I use it for 9mm, .45 and .357 MagAre any members familiar with Underwood Ammo, pro or con please?
Every ammo maker has failures.Underwood Extreme Penetrator is what blew up the Glock 20 on camera (10mm) by Jeremy S on youtube a few years ago....I think it was an improperly seated or crimped bullet in factory ammo? While I don't remember the details of why it happened, I do remember it was Underwood, and a factory fault (based on info from the video...not that we can trust anything online).