Sir, I cannot answer your question with factual info. I do carry +P in my model 36 and model 60. I don't shoot it on a regular basis though. I will practice with WWB and then run a cylinder of +p's through the little snubby to stay familiar with the recoil. If member(s) with better info cannot provide a more accurate answer, you may can find it over on the S&W forum. Sorry sir that's the best I can do now.