Quote:
Originally Posted by mrcvs
"...who ever originated the idea that blackpowder rounds must be loaded with Magnum primers?
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This is not a general "requirement" for loading black powder. This began with those shooting long range precision games with black powder target rifles. Rules prohibit duplex loading and they have found that they see less fouling and improved accuracy when using magnum rifle primers. You are correct, this is not necessary.
Personally I do duplex load, use a grease wad under the bullet, and use standard large pistol primers in rifle cartridges. But I am hunting and recreationally shooting where NRA rules do not apply.