I'm starting out with .38 Special/.357 just because the distances are relatively short. My carry gun is a Combat Commander in .45 ACP and my target pistol is a 1911A1 in .45, but they won't let me shoot those!
There are some people who download the .38 spl but there aren't many of them. The big problem with that is that you don't get knockdown on the moveable targets. It's like using downloaded .30 caliber on the metallic silhouette and then hearing it hit the rams and just watching them sit there. It's counterproductive.
The scenarios can be a good deal more creative than IPSC and the time pressure is fairly intense. I like it! (I've just got to get the hang of loading those darned revolvers! I have never been a wheelgun person!)
It did look like a lot of fun but as I said, I was turned off by the lack of recoil in the guns regardless of the caliber. I also tried to watch that movie “Hell to Pay” which employed a lot of the SASS members but the acting was atrocious. The special features for the movie were more fun to watch.
There’s supposed to be a huge match at Glen Rose, Texas on the third weekend of the month. I still want to take a ride out there and check it out someday. Only problen is the third Saturday is my IDPA matches.