ORIGINAL: SteveBNy
I have a CVA Optima Pro and the book that came with it stated the recommended round for the gun were Power belt bullets.
Probably because they make them.
Lots of far better choices - most less money as well.
If you have to shoot them for some reason, use no more then 80 gr powder to stop fragmentation.
Steve
That's your answer in a nut-shell. My suggestion would be for you this summer to tinker around with other bullets. LOTS of better choices in bullets out there.
Google "Powerbelt fragment" and "Barnes fragment" or "Nosler fragment" and see the differences in hits