I've vibrated ~100 44 RUS shells and ~100 44 MAG shells. I plan to load some maxed 44 RUS loads to test next week at the range (5.7gr Universal under a 200gr LSWC, but I'll be shooting 180gr coated LSWC and JHP XTPs).

That may seem weird, but Hodgdon claims 970fps with that 200gr load, and since I have a bunch of 180gr XTPs, it may become my CCW load for my Taurus 445 Airweight. I just want to get the XTPs consistently over 800fps from the Taurus and I'll be happy. If I can't get the RUS into the range I need, I may move up to 44 SPL but I don't have much 44 SPL brass so I'd rather not.