That explains it...
So they are probably shooting firearms chambered for .45 colt, etc, but reloading them really light?
I can't seem to find the video with the actual shooting in it, but by searching in youtube for "cowboy action", a series from Expert Village comes up (along with other stuff of course). There are probably 8 or 10 videos from them. Most of them are explanation, and not shooting, and I can't find the one where the instructor himself actually shoots the course.
Thanks for the input.