I bought the 9mm conversion barrel to shoot USPSA Production. I practice with the .40 S&W barrel every time to go to the range for practice. practice week hand shooting, clearing jams, failure drills ect.
Still, for defensive purposes, I practice more the my P239 and M&Pc both in .40 S&W.
For competition, I am going to 9mm.
I buy bulk ammo all the time. It does help, but I really need to start reloading.
How many rounds should I be able to shoot in my 9mm conversion barrel before I can claim "repeatability"?