Ryan,
Again, I'm more concerned with plenty of eye relief than long LOP. If the eye relief is enough on the scope, or peeps are used, long LOP isn't necessary.
What do you call heavy? .375 H & H - .416 Rigby class, or .500 NE and up? I don't really have any first hand experience with rifle recoil over that generated by something like a 300 grain bullet at around 2600 fps in a Ruger No. 1, and that is tame by some standards.
Kickingest thing I ever shot was Mossberg synthetic 3 1/2" pump gun with a max turkey load. Once.
SRH
