Yesterday I patterened three different shells out ofa Rem. 870 supermag and a jellyhead choke. Hevi 13, Rem. Hevi shot high velocity, and Rem. Hevishot magnum. They were all 3 1/2 inches and 5 shot. The Rem. Hevi shot magnum had by far the best pattern at 40 yards. I have been using Rem. Hevi shot for a few years and it is awesome. The magnum actually out performed the high velocity.They also work great with an undertaker choke. All three are great loads though.