I would never load more than 100 grains in a CVA. I have trust in the TC's though. I have loaded magnum loads in themand never had a problem. It's all about trust because the CVA's have had so many barrels blow up. If you wanna try it be my guest but I wouldn't in those guns. Why risk it? I don't think they've really tested those guns like the TC's. That's my two cents.