Ok. When everyone quits laughing, could you take a moment to answer a question? It might be really dumb and I think I already know the answer, but I have been surprised many times. I have a model 15-4 and want to know if this could be converted so shoot .357 also. I think not, but like I said, I have been surprised before. Thank you very much for your replies.

__________________
Endeavor to persevere. <><

Not prudently. If you want a K-frame .357 you would do better buying a 19 and selling your 15. Your 15 converted would have less durability than a 19. Possibly not be safe over the long term.

__________________
S&WCA 1729

While it may be possible to do as far as the rechambering, it's not a good idea. I doubt that the heat treat on the metal is the same as it would be in a 357 and after doing so the gun would have less resale value. You'd be further ahead to buy another gun in 357.
We always need an excuse for another one anyway.

__________________
Lynnie, Professional Pest

Joni Lynn has the perfect answer.

Good advise! The model 15 was never designed for the .357 cartridge pressures. You would not get very good mileage, and that is probably an understatement.

Chief38

I kind of figured as much, and it's good to get such good conformation from those more knowledgeable. Thanks for all your responses and good shooting. I'll keep looking for that model 19.

__________________
Endeavor to persevere. <><

If you're going to shoot a lot of .357 ammo, you should think about getting an L frame instead, as they can take a steady diet of any type .357 Mag ammo without a hitch.

Especially since the 686 was the first revolver designed by S&W specifically for the .357 magnum cartridge. And it is definitely more suited for the purpose!

The last two posts ^^^^^^^^^ are sound advise. An L or N frame is the ticket for .357's. You can shoot them 'till the sun don't shine and they will keep on going. By the way, not only will the L & N frames last forever, but they are a lot more pleasant to shoot with the Mag's.

Chief38

I knew a gunsmith back in the 80’s that was reaming the chambers of M-10s out to caliber .357 Magnum. He use to work at Smith and claimed that the heat treating was the same for all K frame revolvers (.38 Spl and .357 Mag), from the introduction date of the M-19 forward. I told him he was out of his mind and should stop tearing up fine weapons. Somewhat incensed, he then invited me and another fellow to his underground range beneath the shop to prove his point, where he and the other guy proceeded to put over 200 rounds of full house loads through the gun. He was very pleased with himself and asked if I wanted to try it out. Despite the fact the gun held together, I declined, citing my fondness of my hands, fingers and eyes and the (at the time) easy availability of the M-13. I still think he was crazy as hell. Crazy.