Hi. I'm new to the forum. Last year I purchased a very well kept Super Black Eagle I. Along with the gun came with about a dozen boxes of shells. Last year i only had a chance to get it close to on at 50 yards. This year I tried backing to 100 yards and it was all over the place. The shells I have are 2 3/4 Winchester supreme elites. My scope is a Nikon Slughunter 200. I want to know is the most accurate sabbot round for my gun at about 150-200 yards with this firearm. In western NY rifles are not legal to hunt with, so I have to make the best of it with a slug gun.