Read my thread on M329PD Headspacing!!! For Safety Reasons! And for a little background information on this thread.
Buffalo Bore ammunition primers can be jarred loose, when used in the M329PD, and seat deeper into the pocket of a cartridge resulting in a misfire that may leave you on the receiving end of a Bear attack.
Buffalo Bore makes a load specific round for the Smith & Wesson M329PD revolver. It is the 255 gr. Kieth Hard Cast, Gas Check, Low Recoil. Regardless of Buffalo Bore claims, this is not to be considered a viable round for the M329PD as the primers on this ammunition can and will change their seating depth while cycling through cylinder being fired.
My Ruger firing pin being longer than the S&W could fire the faulty rounds and the primers were then thrust back flush with the headstamp face. I would not trust my life, or my fingers, with this ammunition.