RE: buckshot
the 3in gives u alot more powerto blow through. some 2 3/4 i seen dont go out the other side at 75 to 100 yrds i perfer 3in mag from winchester. BUTslugs are better by far. I would use what ever make u feel 100 percent confident to use so u dont pull when u shot an thats why 90percent of people miss deer.