ASSRA Forum - Original black powder grain size in catridge rifle

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Original black powder grain size in catridge rifle (Read 234 times)

SteveOKo922 Participating Member Offline Posts: 20 Location: Olympia Joined: Jan 29^th, 2023	Original black powder grain size in catridge rifle May 3^rd, 2025 at 12:19am	Print Post
	Had anyone ever been able to pull apart an orginal 1870s-80s 43-45 caliber cartridge and make note of the grains size?


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ndnchf Frequent Elocutionist Offline Posts: 1078 Joined: Mar 6^th, 2014	Re: Original black powder grain size in catridge rifle Reply #1 - May 3^rd, 2025 at 5:44am	Print Post
	A while back I pulled apart an 1864 era .56-50 Spencer cartridge. I didnt measure with a micrometer, but the powder was similar to 2F, although crushed a little by compression. I reprimed the case and reloaded the original powder. Then took it to the range to chronograph it. Here is a video about it. (You need to *Login* or *Register* to view media files and links)


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curdog Junior Member Offline Posts: 83 Joined: Feb 26^th, 2022	Re: Original black powder grain size in catridge rifle Reply #2 - May 3^rd, 2025 at 7:54am	Print Post
	I have learned from pressure tests and the chronograph, that equivalent charges of Olde Eynsford 1 1/2F will yield pressures and velocities almost identical to Curtis and Harvey No. 6 powder used in English black powder express cartridges.


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KaiserKong Junior Member Offline Posts: 85 Joined: Apr 26^th, 2022	Re: Original black powder grain size in catridge rifle Reply #3 - May 6^th, 2025 at 11:30pm	Print Post
	Cursing, I'd like to know how you did your pressure tests.


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