RST uses Cheddite hulls which reload OK once you get the crimp depth right. 2 1/2 Cheddite hull, 14gr Green Dot, 3/4 oz. shot., BPI SG 16 Sporting wads, and Cheddite Clerinox 209 primers. Pressure is less than 5500 and a buddy chronographed the load at 1185 fps. The RST 3/4 oz. load is listed at only 1100 fps.
I use an ancient (gift) Lyman Easy Loader which works fine.