My Jeffery double rifle in .450 No,2 NE is very heavy. As a result its recoil is relatively mild for the type of round.

Calibre / Bullet Weight in Grains / Bullet Velocity in fps / Powder Weight in Grains / Gun Weight in Pounds

.450 No.2 NE - 480/2170/105/13.25 - Recoil Energy of 50 foot pounds, and Recoil Velocity of 16 fps.

The same in a 10.5 lb rifle:
Recoil Energy of 63 foot pounds, and Recoil Velocity of 20 fps.