Did you mean machined instead of machines? That would make better sense.
What seating punch were you using, RN or SWC? Either would engage just the points of the area between the flutes resulting in inconsistent seating depth. If you still have any try a flat face seating stem that will engage the face of the bullet, this will give very consistent seating depth. This should solve the positioning of the cannelure problem and allow crimping. Naturally this assumes the nose-to-cannelure length is consistent! A roll crimp is definitely correct for any monolithic bullet.
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Gunsmithing since 1961
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