At one point when blanks got short, rumour has it the odd IH truck axle was employed. You can always tell one of the 'rifle ranch' barrels because Al built his machine backwards after seeing one - they are all LH twist. His son is out there, the grandson I knew in college.Al Pedersen made his own boring and rifling machine from what most considered 'junk' His barrels were quite accurate. Steel came from a company in Minneapolis called Ryerson. 20 or 24 ft. bars. His equipment is still around , I believe somewhere in S. Sask. Al had a neat little shop on the farm. Lots of stuff came from that shop.Mark