I think that the use of a real carry gun from a real carry holster is to be encouraged. That is, after all, what the sport is supposed to be about. IPSC got away from it, and IDPA, with its categories and rules, is starting to get silly as well. Use a real carry gun from a real carry holster and "compete against yourself" if you have to. Will you win the match? Probably not. Will you win a gunfight if you are ever so unlucky as to be in one? You just might, and that is worth far more than a trophy or other prize.