My first DR hunt was for Wild Boar, I used a Sabatti 9.3x74r. I managed to get inside of 30m for a head on shot. The bullet crossed the whole length and was found just under the skin of the ham. The Pig spun 180 degrees and was DRT.

I took a 470 Merkel to Afrika and missed an amazingly close shot on a Wart Hog because I expected him to pop out further away and had the sight set for 100m. It was kinda fun watching that pig scatter though...

Just a couple months ago I used a Double 10ga Bore Gun for a Wild Boar on a drive hunt. My freezer is full of some of the best pork Ive ever had.