I had an early Guide Gun in 45-70 and I loaded it pretty stiff which was fine till I hunted it, Ouch!
My loads were loud but the rifle killed well and the rifle carried nice and small but that wasn't enough reason to keep the rifle.
I've since sold the ported 1895 Guide and have two others with 26" barrels, an XLR and an LTD, No Ports.
I like the blast delivered a little further away from my face and not re-directed back to my ears but I may have done as well with lighter loads.... Naaaaaaaa.