Very accurate, expands to 1.3", shot about a 1 1/4" group at 80 yards out of my Henry X model. 21 grains of H110, Fed case, Rem 9 1/2 Mag primer. Stopped in the 4th gallon of water, expanded in the first gallon - based on the looks of the exit hole. It is worth your time to call and ask Paul for load data.