Today I shot some H&G #68 (Mimek) from my S&W Model 625 .45ACP.
I have shot many thousands of rounds with RN boolits through this revolver and I've used a lot of the H&G 68 in my 1911, but never the #68 in the 625 before.
What causes this?
The load was 4.1gn of Bullseye with OAL 1.250" and Speer .45 ACP cases.
Alloy was water quenched WW and they were sized to .453".