Thanks everyone for destroying my financial life. I must have one of each!!!
It happens to be the "current deciding factor" as Smith & Wesson is still the current source for this information. Not a well-intentioned gentleman with a burr under his saddle, one who might be reminded that YES, not only has he taken his firm soapbox stance "10,000 times" but typically, every 12th time or so he assures us (falsely) that he "gives up" and won't continue to beat his chest over it... and yet...
And Smith and Wesson disagrees. Maybe it's lawyer talk and maybe it's not. I have seen nothing conclusive either way. I prefer to be conservative and so advise those interested. Of course, I'm NOT saying the gun would blow up or be unsafe, just that it may be stressed more.There is absolutely no difference in metal or design between the last S&W made without a model and the first one made with a model number so why is that the deciding factor? The +P ammo wasn't offered until 1973 so how did they know in 1957 to change the guns? Factory +P is not loaded to dangerous pressures so if it says 38 Special on the barrel it's OK with +P* (for the 10,000th time).
I think I said 1957, but it was 1958. I stand corrected.This ammunition [+P] should not be used in Smith & Wesson medium (K frame) revolvers manufactured prior to 1958. Such pre-1958 medium (K-frame) revolvers can be identified by the absence of a model number stamped inside the yoke cut of the frame (i.e., the area of the frame exposed when the cylinder is in the open position).