I have a Hawken 50 cal. BP rifle that I have shot many times but would like to shoot steel at my club rifle range at 50 or 75 meters instead of the permitted 100 meter range. The safety manager says to shoot steel at the closer ranges I would need to have a muzzle velocity of either less than 1500 PFS or a muzzle energy of less than 1500 FPE. I cannot find BP load data for round ball 50 cal. to meet these specs. Any ideas please to comply and still shoot steel?