The competition is at the Vancouver Swiss club, using club supplied 124gr. Sometimes it's the military issue "pistolenpatrone", and last year it was the Speer "Lawman" 124gr. TMJ, which they say is similar to the Gold Dot. I figured since that's the weight I'll be issued, and that's what CZ recommends, that's the weight I'd practice with.
I've always used the club P210's, but now that I have my Shadow, I'll be bringing that, and figured to practice with what I'll be using. Some of the guys there are absolutely amazing shots. I've managed to win a gong once myself, so I know I can do it, but the last 2 times out I've been disappointed in my results- not enough practice. I've gone through 700 rds, have 100 left, and need to reload.