I have a .470 NE Chapuis that I have been very happy with. As I will be hunting in 2022 for cape buff I will have time to practice and work up a load. The PH I’m going with is absolutely in love with the Barnes TSX. I am working up a load at the moment and used the Barnes data. Found the most accurate load (both barrels in same hole at 50 yards, but 4” low) is on the lower side of the chart. 500 gr TSX with 87 gr IMR4831. When I start going up in charge the rounds start to spread but no more...
Buffalo load in Double Rifle
Buffalo load in Double Rifle