To the OP, if you're wanting to think about recoil of some medium-big bores I'd recommend some 3 inch magnum slugs out of a non semi-auto 12 ga. I find my 375 kicks a little less than the old cooey single shot with a heavy slug. A 30-06 has some kick to it, but these guns are in a different league.
You said you were a bigger guy, so you should be able to take the recoil. Keep in mind one of the lines of reasoning with this is that smaller guys "roll" with the recoil and their movement absorbs it, whereas bigger guys often "fight" the recoil, or take it head on, making their body absorb the recoil (ouch).
Take a look at the Chuck Hawks recoil table to get an idea of the recoil in average hunting rifles. Yes, perception can be different than the numbers, and they are based on "average hunting rifle weights" which might not be accurate in everyone's mind its a good starting point.
http://www.chuckhawks.com/recoil_table.htm
The .308 has about 18 lbs of recoil. The .30-06 has about 20 lbs. The .375 has 37 lbs, so about double what you are used to. The .458 win has 62 lbs so about triple what you are used to.
Yes there are lighter loads available for all of these rifles, but you're not going to want to be using powder puff loads here. Any dangerous game file will make a fine bear rifle, or will hold its resale value well enough that you will be able to sell it and buy a bear rifle if it doesn't meet your specs once you're done with it.
Also, some people will tell you the recoil from the big guns being discussed is more of a push than a kick... It's all about perception and a properly fit gun. The big boomers will give you a pretty serious "push" or "kick" no matter how you break it down.