power belt. Been shooting lead conical last 3 years. I have various. 50 cals, TC Hawken, White Bison, CVA Accura, Pedersoli Missouri River Hawken. They all different bore. TC .501, White. 504, CVA .499, Pedersoli right at .501. I had my mild built at .504. When shooting either Hawken I size down to .502.
CVA I can do .501 or .502. Not sure what Knight is but if that .500 just slides down it may not work so great. JMO...