What he said. ^^cmgee67 wrote:I’d get ahold of S&W and give them your serial # and find out everything you need to know! Good luck! Or google or YouTube it
I’ve done this with a Remington rifle I own. I sent an email to their customer service department with the serial number and model of the rifle, asking how my barrel was rifled, and what the correct twist rate was (their website and catalog listed two different twists for the same rifle model). A week or so later, I got an emailed reply with the information.
I am sure that a S&W CSR can tell you by looking up the serial number whether or not the pistol is safe for +P ammo. They can also tell you what year it was manufactured, and if there is a model# to it, what that might be.