I use a 12ga 870 wm with a cantilever fully rifled barrel. Tasco 2x cheapo scope. Sighted in for 150yrds. I get about 4-6" groups. I use remington core locts and they kick like a mule. They always drop the deer in its tracks. Longest shot was alittle over 100yrds and its lungs were jello. Box of shells is $17 so you dont wanna miss!!!