The 20ga with a riffled barrel and Winchester Supreme partition gold slugs will shoot 150 to 200 yrds. I have a 12 ga Mossberg 835 with riffled barrel and scope. Sight in a 2" high at 100 yrds = on at 150 and 6" low at 200 with 385 gr partition golds. A good 40MM scope will help at last shooting light and early morning. I like the idea of having another shot already loaded(pump) vrs single shot. In our last hunt, my uncle shot a deer at 137yrds with slug.