I've shot probably 1-200 rounds of it. When I tore five apart they all measured within a grain of each other on powder, within a grain on bullets.
Only issue I've had was one got setback last time I was out shooting. I don't remember offhand if it missed the chamber and slammed into the barrel face or what, but I brought it home and pulled the bullet back out to where it needed to be and plan to hand load it next time I take the 50 out.