I've got a Winchester Trapper in 44mag, Lyman 66 receiver sight and I shoot home cast Lee 310 grain gas checks and 240grain gas checks. It is plenty accurate enough, and hits like a ton of bricks. It will feed everything from the 44mags with heavy bullets through 44spec with 240gr slugs without any problems. I even slow stroke it at the range to save my brass and it feeds fine.
Bob