Here in Oregon, our muzzleloading equipment rules specify that conicals for big game hunting can be no longer than twice their diameter for use during muzzleloader-only seasons. For someone considering hunting with one of the faster-twist .45s such as a Whitworth or Volunteer, this certainly limits bullet selection. I just measured a Lee 340-grain .458 bullet I normally plink with in .45-70, and it comes in under two diameters in length, but of course it has very shallow lube grooves for use with BP. Anyone else out there hunting with conicals with this handicap? What bullets are you using?