I've been doing what I would describe as an isometric drill: assume a shooting stance and hold a sight picture for 1 minute followed by 2 minutes of rest, repeat. I'm a relatively new shooter doing IDPA and Steel Challenge. Is this a good drill for action pistol competition? My concern is that I find myself tightening not only my arm muscles, but also my shoulder muscles: might work in Steel Challenge, but for IDPA/USPSA do you ever really lock into this sort of position? Now I do want to improve at the range which demands a)better trigger management and b)steadier sight picture, but for other than bullseye shooting I'm not sure this drill is my best use of time.
I'll also add that we finally have a place to set up our steel plates and practice at "speed" with our centerfire handguns; can't use FMJ or plated, but I'm reloading coated lead.