Fired my first 50 reloads today! .38 Special, 3.5gr 231 (starting load Lyman 51st Ed) , 158gr coated LRN from MBC. Most of the fired brass looks like this:
IIRC this is a sign of low pressure and the brass not sealing the chamber (4" GP100). What is the normal first step to fix this? I don't have a chrono but the manual says 680fps @11,000CUP, no test barrel length listed.
Thanks!