Dear Semi: The '06 will give +- 20 ft/lb of recoil, whereas a slug in a 12 Ga. shotgun delivers at least TWICE THAT MUCH, OR MORE!! If you can stand a 12 ga slug gun's recoil, you can shoot up to a .375 H&H without a whole lot of problem!! This is if you zero your shotgun and rifle both from a benchrest from a sitting position!