Who here shoots IDPA and reloads? Well what power factor do you use for you match ammo and what caliber, bullet weight, powderdo you shoot. I receintly started using a 357 Sig for the obivous reason that compitition shooters went to 38 Super. Greater velocity during the steel matches, I can drop targets faster than 9MM, 40, and 45 saves a few 10ths of a second, as does the dueling tree shoots.