Originally Posted by solman
The jam was not on the first round of a new mag but during the middle of it. I had a hard time clearing that round after using the FA to bump it in. I am using once fired brass Winchester head stamp but still never know what gun it went through. Have Redding FL die set but it's not small base.
It doesn't matter what gun it was fired in before and small base dies may not have helped. It's only a guess, but you may have collapsed the shoulder a bit when seating the bullet. The only way to catch those is careful inspection and/or putting every reload through a case gauge.