...yet more validation. Anecdotal, but looks good to me. Good choice.

From another no BS forum:
Me and some buddies were in Vegas and bought a large batch (9+) of the Botach Level IV Battle Steel plates. We all chipped in and split the cost of a plate to test destructively. Our reasoning was our realistic worse case scenario was M855A1 out of a long barrel (18", longest we had) at point blank range. If it stopped that, then it was good enough to wear. It stopped the M855A1 no issues. We then proceeded to shoot it with a collection of modern and old rifles and hand guns. The only pass through we had was another M855A1 directly on top of the first shot and another high power rifle round directly on top of a separate M855A1 hit. M855A1 spaced out a decent amount were stopped. Everything else was stopped. The plates were a ceramic strike face with a UDPE backer. One of our guys tried to use 80+ .22lr rounds to see if he could burrow through the UDPE backer (he couldn't).

It left everyone there confident in the plates we bought (and the people who had abstained wishing we hadn't). Here is an album from the testing. Resting was conducted March of 2020"

https://m.imgur.com/a/EkT3Clo

Interesting, thanks for digging that up.