I am not sure of the science behind it so I copied this from tigershark ballistics
\”An established fact is that at a given PF a heavier bullet going relatively slowly will produce less recoil (and muzzle rise) than a light bullet going faster. This is because the lighter bullet requires more powder and more powder produces more gas which adds to the weight of matter ejected from the barrel (bullet + gas) which means more recoil. Additionally, the lighter bullet will spend less time in the barrel which means a faster recoil impulse and thus a bit more muzzle rise. There are other factors at play such as weight of the firearm, grip as well as OAL and crimp with both having an impact on velocity and consequently recoil/PF. \”