I need advice on changing shooting hands. I bought a HK P30 because it had releases on both sides (I'm left handed). I went to the range today and firing left handed, a couple of hot casings landed on my arm at the tender elbow bent point. It caused me to jerk the gun without thinking where it was pointing which it was ok this time because I was at the range. Is there anything special I need to do to change hands or is it just practice