Winchester NATO 9mm in HK USP & Sig P226
I recently stumbled across some 9mm NATO rounds by Winchester. It is not labeled +P but on the website it states they are loaded 10% hotter than normal 9mm loads. I have an HK USP and am in the process of purchasing a Sig P226. I have done some research and so far the only thing I have turned up (for both pistols) is that +P loads should be used moderately because of increased wear and tare and +P+ should not be used at all. So would this Winchester NATO ammo be ok to run through these guns on a regular basis?