I have never cared much for what a calculator or table tells you. Shoulder them and see how it feels. I have shot heavy slugs out of shotguns and muzzle loaders and high powered rifles. My 30-06 kicked harder than any slug gun or ML I have shot. And I thought mine was relitively nice on recoil compared to my step dads 7600 pump carbine in 30-06. That thing was just no fun to shoot at all.

It is really hard to tell though since reciol varies so much between rifles even in the same caliber. weight and gun design play a big part in it. There is difference in calculated recoil and felt recoil. I really don't think slugs kick that bad unless you shoot them out of a really light rifle. I don't understand why people complain about slugs but not a field load when some of them shoot the same weight at the same if not higher velocities in some cases. The physics are the same. You want kick, shoot a 2 oz magnum turkey load, or a 3 1/2 inch turkey load! The average slug isn't that bad after that.

Just my opinion though.