The manual says a couple somewhat contradictory things:

" “Plus-P” (+P) ammunition generates pressures in excess of the pressures associated with standard ammunition. Such pressures may affect the wear characteristics or exceed the margin of safety. Use of “Plus-P” ammunition may result in the need for more frequent service."

Which means to me they don't really recommend it, but don't prohibit it, either. Like a car manufacturer is not going to recommend you drive over the speed limit.

But then they mention the SAAMI thing that cmj8591 brings up:

"Use only commercially manufactured ammunition with internal ballistic pressures which are in strict accordance with the specifications of the Sporting Arms and Ammunition Manufacturers’ Institute (SAAMI). If you are uncertain, contact your ammunition supplier for verification."

I have always heard that there is no SAAMI spec for 380+p and assume that's correct. So this seems like a prohibition.

A little confusing, but still tempting. What's the worst that could happen...?

David