Lawful - the newer Model 29/629 is built to shoot the heavier loads but the S&W M629 is not as heavy a revolver as some of the others - ie., Ruger, Freedom Arms. My older Model 29 handles the heavy 300 grainers, just not on an all day, every day diet. It's not my wrist that starts to bother me with those loads, it's the inside of my thumb where the grip smacks me or where the seam from my shooting gloves leaves the permanent imprint on the web of my shooting hand (lol). And, this near 30 year old revolver still shoots just fine. HTH. Mikey.