According to COTW, the .577 T-Rex uses a 750 grain bullet with 177 grains of RE 19 powder, for a MV of 2475 feet per second. ME = 10, 203 foot-pounds.

If this gun weighed 15 pounds, the recoil energy would be 153 foot-pounds. If the gun weighed a mere 10 pounds, recoil would be 230 foot-pounds!

No thanks! My .416 Rigby will kill anything on earth just as dead, just as quickly as this piece, and it won't hurt nearly as much! Whatgood is a rifle that leaves your hands after the first shot??