Lol. Can you run Winchester NATO through a USP? There's not much you can't run through a USP. Heck you're supposed to be able to clear a squib load by shooting it out of the barrel with another round in a USP. I think the manual even says +p+ is okay for the USP. But of course it will accelerate wear.
Winchester NATO is fun stuff, I like it because it's a lot closer to my carry load of 124 gr +P than the typical 115 gr powder puff. It should easily be fine in either of those pistols.
Guns don't kill people. Apes with guns kill people! - Robin Williams
Number of handguns currently owned and previously owned: 45.