Are you looking at the .38Super or a .357 Mag. I've used a revolver for steel and bowling pins for years and love the Mikulek model, but I shoot his grips on my L frames and N frames. If they fit your hand well they work great. I usually shoot steel and don't need major loads, just shoot .38 spcl cast loads, so I've never really used the comp, I just shoot it with the cover in place. Let us know how it goes but if youlike it half as much as I do, you'll love it.
Chris