If memory serves me, the model 19 is a K frame, a firearm meant for .38 spcl. A model 29 is the N frame and comes in .357 and is more robust. N frames are also used for the .41 and .44 Remington Magnum. I had a .44 Rem. Magnum years ago.

I would avoid using the 19 with +P+ if it were my revolver. They made it to accept .38 special and .357 magnum for duty/carry and it will get buy.

__________________
Vern