It's a toss up between my 1895 Marlin 45-70 and Ruger no.1 458 Lott. You'd think the Ruger would be louder but with a short 18.5" barrrel on the Marlin it's hard to tell since I double up on the ear protection when shooting the big bores. I've had people at the range tell me they can feel the pressure in their chest when shooting the Ruger though.