Imreallyslow

Does anyone have any insight or can someone point me to a resource that has information about shooting two different bullet weights during a single match? I've always shot 55 grain stuff but I'm wanting to try out 77 grain bullets for longer range stages. I would assume one would zero the gun for 77 grain (which would be shot at targets up to 600 yards), and just relearn the the holds for the 55 grain, which would be used on the shorter/hoser stages.