Rez45,
I just started casting again and powder coating. My Lee 44 cal 310g mold has a base for a check. I ordered some gator gas check but haven't got them yet.
Yesterday a loaded so 44 mag with powder coated 310 grain bullets without a check. I tried 4 different powders from mid burn speed Longshot to magnum slow burning pp300mr. I didn't do any accuracy testing just ran them over the chrony but they all made it to the target ok. Velocities ranged from about 1000fps to just over 1100 fps.
I'm not running them very fast but I an using a pretty heavy full charge of magnum powder. Do you see any need for checks based on the powder being used or is it all about velocity? If so what is a good general velocity at which a check is recommended?
I've also heard that some gun powders can react with the powder coat potentially degrading the coating and possibly the gun powder charge too. Some have theorized its the nitro glycerin in double based powders that causes the degradation. Does anyone know about that? The use of a check after powder coating would prevent powder contamination.
Bb
