Ah, I see, that is what I have done on my own game. If I may make a suggestion, I think you should keep the H&K Usp either as a 10mm weapon with the current stats or upgrade it to a .45 weapons and give it better stats. It is the only weapon that uses 40 S&W in WOTNM+Your suggested additions to it, and both 10 mm and .45 version of the USP exist in real life, so it could add a bit of variety in these calibers and reduce the vendor/loot clutter, one caliber for only one weapon is not really worth it in my opinion.