RE: Best caliber for under 100 yards ?
You are in the ideal situation to hunt with my weapon of choice...12 guage slug gun. Talk about KNOCK DOWN POWER. I have a Rem 870 with a rifled barrel and open sights. Easy 3" groups at 100-150 yards but, like you, I rarely have a shot of more than 50 or 60 yds where I hunt...just too thick and hilly. I have taken several deer with it and every one was a single shot and the animal went down in his tracks...like a piano was dropped on him.