I've got a good one for you. A friend has the chance to hunt elk in Co. next year with a muzzleloader. His choice of muzzleloader still hasn't been made, but it will be a .50 cal. capable of using 150 grains of powder, we do know that he can't use Pyrodex Pellets, no scopes, and no sabot loads. The pellets aren't any big deal, neither is the scope. The bullets are the big issue. Obviously, they must be cast, they must also be full bore diameter. I have a 375 gr. maxi ball mould, which may work, but wonder if there are any better bullets available for elk. I imagine they'll need to be properly sized, lube could also be an issue. Can anyone recommend some starting info??