STG57

[Ovidio]

Fact is, I sized, trimmed and chamfered each round. Then I use a manual scale and also put the powder manually in each and every round.
After seating the bullet, I measure again each and every round, allowing a maximum of 1/10th of a mm of tolerance.
That's the reason I decided to put everything aside and keep shooting with the Mauser.
I really could not understand how a problem like that could have occurred.
And, sincerely speaking, I still don't get it.
The shoulders have just touched the chamber. It can be seen, but it is miles away from the way the other cases look like after being simply chambered, let alone fired.
Someday I'll take her out again and fire the commercial S&B rounds. They have the exact same length of mine, but the brass is new.
Let's see...
Luckily I don't fret about semiautos.