Probally a 30/30 or a 357 magnum

.300 Weatherby magnum..though i'd say a 12 gauge slug is worse for recoil

.500 S&W Magnum revolver...one word: sweeeet..

.50 ML was pretty easy, much like a .243

slayer

.54 cal muzzle loader if that counts, otherwise...biggest bore would be a 10 guage.

I have only shot my 12 gauge 3 1/2 and a .22. I shot at two deer in one hunt for a total of 6 shots and my shoulder was brused for 2 weeks. I can not imagine anything bigger then that.

30-378 weatherby NOT ported

Biggest gun I have EVER shot....Biggest pistol:.50 cal Desert Eagle.Biggest rifle:Barret M82A1 .50BMG.Biggest shotgun:3inch 10Gauge.All have a kick to em.But REAL fun!

i use a 12 3 1/2 buckshot for hunting and that kicks alot but the biggest rifle is a 300 ultra mag. you can feel the percussion when you shoot it it feels like a blast of wind

i know what you mean. i was at the shooting range when someone was shooting one, and whenever i was getting ready to shoot and he shot, i felt my sinuses rattle. it was wicked

HMMM.. cant remember all the guns i shot. I would say a 10 gauge 3 1/2 inch slug. That was one he** of a kick though.

.458 Win. mag........OUCH!!