The NEF 12 gauge with the fully rifled barrel 3 inch slugs most recoil.

The marlin guide gun with max loads and 400 grain bullets is in second place it's sighted with no more than 2 rounds from the bench.

Most damage I have received from recoil was shooting my .325 WSM left handed; moving to get a right hand shot would have spooked the deer, cut the bridge of my nose and left a wee bump for a couple of weeks. Luckily it was cold enough the blood froze before it made a mess of anything.