I've got a Handi Tracker ll in 20 gauge rifled barrel, and I've shot, the Copper Solids, and Hornady SST's and I wasn't at all impressed with the accuracy, but the best results both on the target and on game has been with the Remington Buckhammers.
I've shot two deer and neither went over 40 yards with a massive blood trail, and two small hogs that were right at 50 yards, dropped on the spot, and I put the slug right behind the ear where I was aiming.
They are deadly accurate out of my gun, and 1oz. of lead flying true to the target will get your game every time.
I won't shoot any other slug out of my gun but the Buckhammers from now on!