The 30-30 will work, assuming it's a lever gun the trigger isn't adjustable like a bolt, unless you stone the sear...

Is this just for hunting deer??? If so, you might want to look into buying a smaller caliber down the road...

I've been through this with 4 different buddies, had a heck of a time convincing them that they were flinching...You are over half way there if you realize this already...

Can you buy managed recoil rounds for a 7mm Mag??? If so, that might do the trick as well...Or get someone to reload them for you...