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Old October 11, 2017, 06:21 PM   #10
buck460XVR
Senior Member
 
Join Date: December 28, 2006
Posts: 4,341
Quote:
Originally Posted by NoSecondBest View Post
There are some powders that require a crimp to burn efficiently. WW296 immediately comes to mind..
^^^This. IMR4227 is another powder that likes a firm crimp for consistent ignition.

From the Speer reloading manual from the "reloading handgun Cartridges" section....
Quote:
When using slow burning propellants, a heavy crimp helps insure that the propellant ignites completely, acheiving higher velocities and cleaner burning".

Last edited by buck460XVR; October 11, 2017 at 06:28 PM.
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