84 grains is the max for the 50 caliber and 77grains or 110 by volume is the maximum load for the 45 caliber according to the Manual. I finally got with Dennis at fury bullets and shot the .403 with the light blue harvester sabots and got it shooting pretty well.
What grain by weight are you guys shooting? I shot the max 77 grains by weight and my gun is nothing less than horrible. I'm using the ELR CVA Bullet and having no luck. 4 inch groups at 100 yards and 15 inch groups at 200 yards not exactly what I was hoping for. Anyone know any secrets I'm missing?