Lower muzzle velocity equals less recoil.
Negligible and more than offset by the weight loss with the shorter barrel. Each inch of barrel length increases or decreases MV by about 1%.
I'll edit it so that it's more clear that we're talking about cutting back a barrel on a 30-06 from 22" or 24" to 20" with the expectation of reduced recoil:
Negligible and more than offset by the weight loss with cutting back the barrel. Each inch of barrel length iin the 30-06 ncreases or decreases MV by about 1% between 20" and 24".




















































