My 1926 303 take down has the bad bore, but will still do 3 inches at 100 yds, good enough for close woods hunting. The first smokeless ammo still had corrosive primers and some early stuff was still kicking around for years, just like today when some one gives you some from the 50's 60's or 70's that they found cleaning out uncle Joes garage. Its not a far stretch that the same thing happened in 1930 with 1910 ammo someone found. I fitted mine with a no drill scope mount and a Weaver K3PCH