I hear this a lot, J-Frames, +P or not? I will just give you my and my family experience with the M60 and the M36. Please note that I am not making claims for the older Chiefs Special models, but I firmly believe that they are quite stout weapons, and I routinely use +p in my non numbered Centennial.
My wife is going on almost 30 years of being a big city cop, with 25 of them as a detective in an SVU (as they are now known). She is on the SWAT Team, as a "talker" but she still has to do the monthly SWAT training, including shooting, running, climbing and all that stuff that would no doubt give me a first (and final) cardiac infarction. She has carried a revolver her entire career, she got hired just as semi autos were making an appearance in her department. She chose a revolver and stuck with it. Her first was a M10, which quiclky changed to MY PC tuned M66 no dash. Her off duty/BUG has always been a M36 that is on its 3rd generation of cops. She carries both on duty. She qualifies every month with both. For her entire career she has use the issued 158 gr SWC HP +p ammo (usually supplied by the low bidder). For the last 23 years she has fired 100 rounds a month through her M36 of that +P ammo. She has also used a substanatial quanity of the 110 GR JHP +P+ "treasury load", probably about 1K rounds through that weapon. She shoots the same ammo through the M66, in the same amount.
Both guns are somewhat worn, the M36 has about 50% finish left, but is almost as tight as when it was new, it locks up tightly, with no fore/aft play at all in the cylinder, the timing is perfect. It actually seems in better mechanical condition than the M66. And it is dead bang accurate. She still rountinely outshoots all the guys, particularly in the running shoot, and finishes in almost the same time frame, thanks to both guns being modified for moon clips, she may be no JM, but she can eject and reload either gun in less than a second, usually faster than a semi auto reload. One of the training shoots requires the shooter to jump over a horizontal 55 gal drum, and land and shoot, she fires her last shot just before the jump, and reloads during the jump and comes down during the first shot of the new load.
In short there have been over 21,000 of those +P loads through that M36 and it is still going strong, I have seen "stronger" guns give up after half that many.
Shoot +p through a J frame? Naw, why take a chance.
BTW, there is total domestic bliss in our home.
