Francis Bannerman bought thousands of .43 rolling blocks captured during the war and sold thousands here in NY state from his store in NYC and his island arsenal in the Hudson river near Cold Spring, NY. Like most army surplus rifles many were used by hunters. More likely from Bannerman than Rosy's boys. Bannerman had so many he stripped the wood off of some and used them as rebar in cast concrete blocks for the breakwaters on his island. (my avatar photo has a few of them lying on the walkway.) There was a reprint made of one of Bannerman's catalogs from the 1920s and it is an excellent reference book for old weapons, if you ever find a copy it is worth owning. It will also make you cry when you see civil war Colt pistols sold for ten-twenty bucks back then. Bannerman was probably the world's largest army surplus store and he outfitted small foreign countries with weapons and uniforms, machine guns and cannons. He supplied the Panamanians fighting for independence from Columbia which led to us being able to build the Panama Canal.