WAY Less with the 45-70 in my experience.
Shooting 405gr Jacket Soft points in 45-70 was alot of fun.
Shooting the same gun with a 12 ga barrel and just cheap Wal-mart skeet loads was enough to give me a headache and rattle my teeth. I only fired 2 or 3 rounds shooting skeet with it before I took that barrel off and never used it again.
I used the crap out of the .410 and the 20 ga though.
I am no longer participating in gun forums.