If all you shoot is larger-bore hunting rifles, chances are you are pretty careful about your eye relief. But for me, I got used to shooting ARs regularly for about forty odd years, normally got the nose right up to the charging handle ... and then when I went out to shoot "real" rifles ... well, you're gonna get whacked sometime. That's been the last coupla times it happened to me. Last time it was with a .223 WSSM (never fired one before) -- all I heard was the ".223" so I snugged up on the scope big-time. Bled like a stuck pig. But hey, chicks dig the scars, right?