I shoot USPSA.... Class D (Limited). All stock (even holster) SFx and cheapo 2-mag holder. Have (4) 20rd mags. Most stages i'll never even need the 3rd mag. Looks intimidating at first with all the gear and race guns, etc. But the shooters are all over the spectrum (good-bad) so I wind up in the middle usually! Most ranges usually have a club or team or host matches.
Its fun. I just went and shot one to start... my gear was jacked up and low-speed and took my time until I got more comfortable. A seasoned guy asked why my mag/bullets were facing the way it was.... I didn't know, so I got an explanation of how to. Everyone helps. Best suggestion, get earmuffs that electronic dampen with mics so you can talk (and hear).