With similar weight guns the recoil would go like this assuming all were loaded with mid-weight bullets (least to most):

.30-06, 7mm Mag, 300 WSM, .300 Win Mag, 3 1/2" 12 gauge turkey load. The .30-06 and 7mm Mag, and the two .300's may be too close to each other to tell the difference, and the 12 gauge turkey load is MUCH more than any of those listed.

Mike