OK, Have the Bison ready to shoot. Have some 480 grain power punch and some 405 grain black belt HP in .503. I am so done with heavy bullets and light guns any suggestions? I'm thinking some 300 to 350 bullets in .458 dia in sabots. Any of you have any "real world" experience with such?? Is there any replacement for the "as I remember" power star sabot/bullet combos?? Or i'll just have to check the diameter stickey and see what might fit. Thanks to all who post even if it's kinda outdated and old like many of the DWBs. W