R.W.:
I have a 77/44 with a 3-9x40 ProStaff. I installed a Volquartsen 77/22 target sear when I first bought it several years ago, which changed the trigger from mediocre to very good. It was not a bad lightweight carbine like that, I've only ever shot it with Hornaday Leverevolution and WWB 240 grain SJSP factory ammo. It was about a 4", 100 yard rifle (in my old, shaky hands, anyway). I just recently installed a 0.004" shim and have only shot it enough to check the sights before deer season. My impression is that it's now a 2" or 3" rifle, but that's not really a very firm number as I have not shot it off a bench yet, just a few quick sitting shots on a somewhat windy day. A couple of 3 shot groups led me to think it might be a 1.5" rifle, but that needs to be verified. As expected, the shim did not change the POI. Once deer season is over, I'll do some more shooting and see what its really doing. For no more than what the set of shims cost, I think its worthwhile to give it a try and see what happens. And, if you like a lighter trigger, the target sear is a great investment.