IPSC Production vs USPSA Production
Hi all. I just got done with about two hours of research on this topic. For what it's worth, here are my findings.
Glock long slide models (34, ect) are too long for production.
Big difference here is that they distinguish between major and minor. Therefore, you can shoot a 9mm in IPSC production, but you'll be handicapping yourself. .40s rule here. Popular handguns include CZ SP-01 and Tanfoglio production models, and Glock .40s.
No distinction between major and minor, so 9mm rules here. You can shoot a .40, but it will be a handicap to yourself.
Popular guns are Glock 34s and CZ SP-01s