I'm getting ready to buy a Marlin guide gun. I've already got my dies and everything I need to reload for a .45-70. I've never reloaded for a cartridge I've had to crimp before, so this is new to me. How do you know how to adjust the seating/crimping die?
I followed the RCBS directions, got the bullet seated to the right depth, then lowered the cartridge and unscrewed the seating plug and lowered the seating die 1/8 turn, then crimped the bullet. I put the unprimed, uncharged cartridge in a bullet puller and tapped the ground. The bullet moved maybe an 1/8". I repeated, screwing the seating die down on more 1/8 turn. Then did the thing with the bullet mover again, and again the bullet moved.
There is no groove cut in the cannelure - should there be? Do I need to crimp until the bullet won't budge when put in a bullet puller like I did and tapped it?
