Just to confuse matters, this comes from the S&W FAQ's on their web site

"What kind of ammunition should I use in my S&W handgun?

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).

Be certain all ammunition you use complies with the SAAMI specifications. If you are uncertain, contact your ammunition supplier for verification.

If you would like any further information on specific ammunition, you may contact one of the major ammunition manufacturers from the link listed below: "

I carry +P but see no need to abuse a handgun with jigh pressure ammunition for practice, a practice I've use ever since I bought my first pistol.