If they are copper and came in the kit along with the rifle, chances are they are 295g. As dave said, look on the upper corner of the packaging. My CVA shoots powerbelts well and I prefer the 295g with 90g of 777 loose powder. The issue of charge really has to do with fragmentation. They are not designed to be pushed much faster than 13-1400 fps. 90g of powder should get you there.