I made a 4 bore barrel for that guy. Big mistake, I had another half a dozen orders for them, I told the boss the tooling wasn't made for 4140 steel this is going to ruin the tooling. But she took the orders anyway and $1500 dollars and a six month wait later for a new reamer, she figured out why we don't make 4 bores for anything but muzzle loading rifles that can be made from mild steel instead of chrome moly steel.