The fact that...compared to later guns...the HP has...or at least MAY have...softer steel is not new. Many years ago the Brits experienced locking lug issues after shooting lots (thousands) of their old 2Z (Two Zed) ball loads in these guns. It has been my understanding that this issue was addressed with the latest MK II and MK III models, at least to a degree. I can say that +P or +P+ is ALL I shoot in my HP and other 9mms...I use the M882 for practice loads...and no problems as of yet with my relatively new FNHP after maybe 1000 rounds of mixed NATO and +P+. I have no idea where Bob...who, I am sure, knows better...got the comment abouit alloy frames, but the HPs are all...except for a few rare models...steel framed.

I would have no problem at all using +P or +P+ in your MK III if it belonged to me...but understand that it WILL wear the gun faster than standard pressure loads, and..obviously...thousands of rounds will wear it even faster.

And for Combat_Jack...in Europe, what most guys call a "lot" of shooting is about 200 or so rounds per year. Yes, there are a very select few who are able to do more, but damned few. In most of the rest of the world, you are "somebody" if you are even allowed to own a handgun, much less actually shoot it!