I am wanting to find a friend who has a 7 mag and do some shooting and see how I do with the kick.
First off there will be QUITE a difference in recoil between the 5.56 and a 7mm class cartridge. That being said, my experience with recoil was that 90% of it was the noise - make sure you wear good ear protection. Once the blast was reduced by good quality ear protection the actual "kick" was easily managed through technique (lean into it slightly).
Other recoil reducing factors (I'm not a gun nut so I leave detailled commentary about that specific rifle to others) would be:
A heavier (as in actual weight of the rifle) rifle kicks less than a lighter one, and a semi auto will absorb a good portion of the recoil as the gases are used to work the action meaning less hits your shoulder all at once.