Quote:
Originally Posted by Rpg
The frame cracking on M19’s was associated with light weight 357 bullets driven at magnum velocities, eg. 1,400 FPS with 125 gr bullets.
Don’t hot rod your loads and you’ll be just fine.
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^^What he said^^
Xtreme recommends that their standard plated bullets be kept to velocities below 1200fps - which is the lower end of 357 magnum loads. As long as you follow that advice the ammo isn't going to be the "hot" light bullet loads that crack forcing cones.
That also means you aren't going to be using a hot magnum powder that will erode the forcing cone - another cause of cracking.
You will be just fine, though you may find the difference between your POA & POI will require adjusting the sights (or your sight picture). Mild loads with light bullets will likely shoot lower than full power magnums with heavier bullets (like 158gr).
Use jacketed bullet data, start with minimum charges, and work your way up. Probably won't want to go past the mid-point between min and max to keep the velocities down.