Take one to your local archery shop and have them weigh it. They should be able to give you the exact weight. I have been hunting exclusively with muzzleloaders and bows for the past 15 years and have found those powerbelts to be the easiest loading muzzleloader projectile on the market. But, I have also found them to often be inconsistent grouping and not always the best performance on impact. I own muzzleloaders from Knight, Thompson Center, Traditions, CVA and Austin Halleck, and everyone one of them shoots something better then the Powerbelts. Just keep that in mind if you start to move your range out a bit and your grouping starts opening up then maybe change your bullet selection.