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revolver crimp style

benstt

Custom
Founding Member
Roll or taper crimp on a revolver round? What are the advantages to each? This is for a .357, a .44, and a .460.
 

Annihilator

Ronin
Founding Member
Roll crimp on a revolver round, taper is for semi-auto. Use a heavy roll on the magnums so the bullet won’t creep forward during the recoil effects of firing the gun, taper is mostly for semi autos so the bullet won’t get pushed into the case during the loading cycle of the gun.
 

benstt

Custom
Founding Member
Roll crimp on a revolver round, taper is for semi-auto. Use a heavy roll on the magnums so the bullet won’t creep forward during the recoil effects of firing the gun, taper is mostly for semi autos so the bullet won’t get pushed into the case during the loading cycle of the gun.
Thanks!
 

RangerBill

Operator
Exactly as stated. Revolver cartridges as you asked about are rimmed, and headspace on the rim. Auto loaders are rimless or semi-rimmed, and must headspace on the case mouth. If you don't get an adequate taper crimp, the cartridge won't chamber fully. As an example, the 45 Auto usually has a finished taper crimp to .470". Dies are sold as such, rimmed revolver dies have a roll crimp feature in the seating die. Taper crimp with 45 Auto, 9mm, 40 S&W, etc.

Regards,
Bill
 
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