I didn't own the ported model 1895 45/70, but they were reputed to be very loud. I believe they have been discontinued for that reason. That and probably the porting wasn't really needed unless you were shooting very hot handloads and most folks don't shoot those hot loads.
My 1895 45/70 (which I wish I had not sold) was pleasant to shoot with mild loads, but was a real kicker with the hot ones.