This is a heeled bullet which can be hand-started into the case without mouth expanding sized brass. It can also be hand-lubed, by wiping cup grease on the shank with the fingers, then the bullet seated against its stop surface by pushing the nose against a table edge. I carefully roll crimp using my regular Lee seater, NOT the factory crimp die, and the nose flange is cold-formed to match the die interior, forming a .435-.440" diameter driving band .060 wide above the crimp groove. When loaded in Starline brass neck diameter is .443". The cold-formed nose band does not impinge against the rifling, but seals the forcing cone in oversized or worn barrels. Rounds chamber and extract without marking from my Microgroove Marlin 1894S. I'm just letting people know this design is out there if you have a tight-necked chamber which otherwise precludes loading larger diameter bullets. This may be an option. 30wcf had promising initial results with it. I'm shooting some in my new rifle this week.