I purchased a CVA Optima V2 Long Range, in 50 caliber. The paperwork that came with it, recommends Power Belt bullets and White Hots powder pellets. I have yet to find the IMR brand White Hots powder pellets, but I've just begun my search.
Many years ago, I had a CVA Optima Pro, which is very similar to this model. I tried shooting Hornady and Barns bullets out of it and the accuracy was a "no go".
When I got back home I took the time to read the paperwork that came with the ML rifle and wouldn't you know they recommend Power Belts. I picked up a pack and they shot amazing groups. 
In the box with this rifle, it recommends White Hots for optimum accuracy.
Before I buy several packages of Pyrodex and 777 (if I can't find the White Hots), does anyone own one of these ML rifles?
Bowhunter57
Many years ago, I had a CVA Optima Pro, which is very similar to this model. I tried shooting Hornady and Barns bullets out of it and the accuracy was a "no go".


In the box with this rifle, it recommends White Hots for optimum accuracy.

Bowhunter57