Well, alrighty then!!! You have a "four-screw" K-38...nice gun!!! I INADVERTENTLY helped MRS. 3-5-7 acquire one last year...a guy at work was going thru a messy divorce, and needed to part with some guns for CASH, so...I brought it home, thinking about buying it for myself...the Mrs. sees me "playing" with it, and asks "What is that?" I 'splain...she looks at said K-38, pronounces it a "fine gun", and asks what David wants for it...I tell her, whereupon she digs into her purse, hands me the stated amount, and says to "tell David I said 'Thanks'"!!! Oh, well...I can probably use it sometime...IF I ask NICELY...but, back to the "four-screw" K-38's...the Factory will tell you that they ARE NOT approved for "Plus-P's", but...keep in mind that the Model 19 .357 Magnum, ON THE SAME K-frame, was introduced about five or six years BEFORE your gun was made, so...occasional use of "Plus-P" ammo should do it no harm whatsoever!!!....mikey357