Guess I am sold on using gas checks from now on
Did some testing with my 458 Socom saturday.
loaded up 20 rounds of each. No gas check, gas check after first Powder coat then 2 more coats, and gas check after all coats.
The no gas check group wasn't. Only 4 of the first 10 actually hit paper. So I stopped wasting components.
The Gas check after everything had about a 6" group at 50 yards. Not great.
The Gas check in between PC grouped 15 shots into the same large hole and 5 flyers to the right.
Looks like I know how I will be making my bullets from now on.