Originally Posted by
lar45
Were you loading mixed brass? Some commercial and some Military surplus?
If it was a stiff load in commercial brass, then it could have been way over pressure in Military brass.
I'm not sure how picky the 9mm is on the subject, but I know first hand that 45acp case internal volume can raise pressures in a huge way.
It was my first time loading for 45acp, way back when, and i used some TZZ Israeli brass that I picked up from a qualification while onboard the ship. I used my buddies recipie with a 230 LRN and 4.7gns of 700X without reducing and working up... His load(4.7gns of 700X) in commercial brass gave around 890fps, in the TZZ brass they went over 1300fps!! I backed way off and worked back up shooting over the chronograph until I hit 900fps at 4.2gns.
I always sort my 45acp brass now.