K31 7.5x55 FL case sizing issue
Okay, not so much an issue as a query. I usually FL size all my rifle cases and bump the shoulder back 0.002. I use a comparator gauge to measure this.
I did the same with my once-fired 7.5x55 swiss brass except the bolt wouldn't close on it.
bumped the shoulder back to 0.004 and the bolt close but required force.
So now i have the die set up to bump the shoulder back a whopping 0.006 and they chamber fine.
Does anyone know why the shoulders need to be bumped back so much in the k-31?