My dad's 30-06. I was maybe 10 or so, he was zeroing it in. 100 yds one shot. A quarter inch off center, slight left. Bruised right shoulder for a day or two. Didn't think it had that much recoil, yeah I saw the cartridge, just underestimated the boom. 6 years later I shot it again, and it didn't feel like enough boom. It is my least favorite, and my most favorite.
I've come to realize I love big booms, when I expect it, and lots of recoil.