If the Frame is Aluminum, it will have the clear coat and that has durability issues & the Ti Cyl. you have to clean with like something like M7 Pro, or the finish on that will come off and then the erosion comes in both the cylinder and the frame. Also, my 342 says jacketed ammo only because the recoil can unseat regular +p lead loads.
The 148gr Wadcutters, or the 110gr Hornady +p JHP Flex Tip are what I use. I changed my Front pinned sight to a lower one to hit with the 110-125gr loads.
Just watch what you clean the gun with and you will be ok if it's an Aluminum Frame & Ti Cylinder. Nice to carry & even with the 110gr +p not user friendly- .357 forget about it. No Ballistic advantage to .357 in a 2-3" barrel anyway- .38+p is better for or that role IMO.
If this is not a really good deal, then I would probably get a M&P Scandium Frame with a Stainless Steel Cylinder knowing what I know now.