I'm still sitting on the sidelines debating whether to get a .45-60 or .45-75 in nwmp carbine configuration. Memories of heavy loads in my Browning '86 src are pushing me towards the .45-60 and it should do nicely for range shooting and deer hunting but then again the .45-75 is the more authentic choice of my red coated fore fathers!
I have a 45-75 now. But I would really like to make up a round barrel, half mag 1876 in 40-60. Roosevelt's favorite '76 rifle. Brass would seem easy enough. The bullets not so much. Lighter bullets mean less recoil in general. As does less powder. And the 300g and 350s in the 45-75 seem to prove that. But easy to understand why a 40-60 in the 1876 with a short round barrel and button mag would quickly become a favorite rifle.
But I want to shoot the rifle a lot. Next one for me will likely be a 45-60 even though I'd really like to have a 40-60 for all the reasons mentioned. I'll just use 300g .45 bullets because every thing just seems so much easier all around.