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Chowmif16 · September 19, 2012, 01:23 AM

Got a question about Magnum vs normal primers for BP cartridge (pistol and BPCR).
I've heard several opinions and don't know what to believe.
Opinion #1:
Magnum primers result in a cleaner burn. I remember reading that 10-15 years ago, magnum primers were popular in BP cartridge reloading.
Opinion #2:
Magnum primers result in slightly higher muzzle velocity, but leave harder, baked on fouling (which is clearly a problem). I seem to remember a post referencing old reloading data which implied that hotter primers left baked on fouling and were developed in response to smokeless powder.
Any thoughts?
Cheers,

September 19, 2012, 01:23 AM	#1
Chowmif16 Senior Member Join Date: April 22, 2012 Location: Huntsville, Utah Posts: 106	Primers Got a question about Magnum vs normal primers for BP cartridge (pistol and BPCR). I've heard several opinions and don't know what to believe. Opinion #1: Magnum primers result in a cleaner burn. I remember reading that 10-15 years ago, magnum primers were popular in BP cartridge reloading. Opinion #2: Magnum primers result in slightly higher muzzle velocity, but leave harder, baked on fouling (which is clearly a problem). I seem to remember a post referencing old reloading data which implied that hotter primers left baked on fouling and were developed in response to smokeless powder. Any thoughts? Cheers, __________________ Chowmi