Hello. I've owned a 10 gauge Remington Sp 10 for probably 7 years now and have had a SBS and a pump. I hunt geese and turkeys with it. I also shoot a Benelli Super Black Eagle 12 gauge 3 1/2 inch mag. Both calibers throw the same amount of pellets. The ten gauge just thows them in a much better pattern. One reason is because the shot column is shorter therefore yeilding less deformed pellets. The 10 does it with less pressures yeilding less deformed pellets. The 10 (this is one I am not 100% sure on) is easier to build square loads (better proportioned loads ieressures, velocities, less powder). What a back-bored 12 gauge in the hands of a trap shooter does is imitate a 10 gauge, they are bored to 10 gauge specs. The 10 with its better patterns will give a better killing pattern at longer distances. The pattern will display a more dense, shorter shot string and less errant pellets lost. What you can do with taylored lead loads is to drop a flying goose under the best conditions is to drop a goose well past 75 yards (I won't tell you how far). The guns swing like clubs and the recoil? Well I cannot tell you. I patterned it once and never again. When you hunt with it you'll never feel it or go back to a 12 gauge for the true big game birds.There is some good info on this amazing shot shell. If you want more reading PM me. I'll be happy to direct you.