I am trying to help with pre model 10 2 inch barrel smith. Was needing help with both id, what year produced,and what rounds are safe to shoot in it. The gun appears very solid, some bluing wear from carry, locks up solid, even gap around the crane and frame,no evidence of timing issues, end shake or the like. My concern is the barrel is marked 38 S&W special ctg. Looks like a model 10 for the most part and would guess m&p pre 10. If I get the serial number is it possible to date the gun. Also is it safe to shoot and what hand loading of 38 would be safe to shoot. 158 grain cast lead bullet would be the projectile Any help appreciated. SN