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Duplex loads for 40-50 SBN (Read 685 times)

Babydriver Junior Member Offline Posts: 77 Joined: Mar 22^nd, 2024	Duplex loads for 40-50 SBN Mar 2^nd, 2025 at 11:14am	Print Post
	Any suggestions would be welcomed.


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Smoke Oldtimer Offline Posts: 750 Location: San Diego Joined: Feb 24^th, 2013	Re: Duplex loads for 40-50 SBN Reply #1 - Mar 3^rd, 2025 at 12:34am	Print Post
	IIRC, I was loading .45-90 with 75 gr Swiss 1 1/2 on top of 5 gr 4227. As I recall, idea was that is 1 grain of 4117 adds the equivalent of 3 grains of black. (this is intended to invoke (provoke) some discussion around the practice of these two powders (and nothing provokes discussion more than disagreement on a forum )

	Never be afraid to try something new. Remember, amatuers built the Ark, professionals built the Titanic.
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art_ruggiero Frequent Elocutionist Offline Posts: 1151 Location: CT Joined: Dec 14^th, 2008	Re: Duplex loads for 40-50 SBN Reply #2 - Mar 3^rd, 2025 at 7:34am	Print Post
	remember the case capacity of the 40/50 is low try about half that used in a 45/70 load maybe 3 grains?? art


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Babydriver Junior Member Offline Posts: 77 Joined: Mar 22^nd, 2024	Re: Duplex loads for 40-50 SBN Reply #3 - Mar 3^rd, 2025 at 8:50am	Print Post
	Thanks to both of the replies.


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Smoke Oldtimer Offline Posts: 750 Location: San Diego Joined: Feb 24^th, 2013	Re: Duplex loads for 40-50 SBN Reply #4 - Mar 3^rd, 2025 at 10:40am	Print Post
	You can't get 90 grains of black in a solid head case so the 75 gr of black and 5 gr of 4227 was an attempt to duplicate the full house load in the .45-90. So, if 1 gr of 4227 is equivalent to 5 gr of black, for .40-50, you could use 30 gr of black on top of 2 gr of 4227. The above assumes that my memory of the ratio of 4227 to black is correct, something that I will be verify with the Russ Hooks, the guy I got that info from several years ago. I'll be in touch.

	Never be afraid to try something new. Remember, amatuers built the Ark, professionals built the Titanic.
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Babydriver Junior Member Offline Posts: 77 Joined: Mar 22^nd, 2024	Re: Duplex loads for 40-50 SBN Reply #5 - Mar 3^rd, 2025 at 11:51am	Print Post
	Thanks


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Smoke Oldtimer Offline Posts: 750 Location: San Diego Joined: Feb 24^th, 2013	Re: Duplex loads for 40-50 SBN Reply #6 - Mar 3^rd, 2025 at 8:02pm	Print Post
	My memory was not correct. 1 grain of 4227 is equivalent to 3 grains of black. So 75 gr Swiss 1 1/2 and 5 gr of IMR 4227. That was a nice, clean-shooting load combination in my .45-90 and I was ringing the white buffalo silhouette at Raton pretty reliably.

	Never be afraid to try something new. Remember, amatuers built the Ark, professionals built the Titanic.
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Babydriver Junior Member Offline Posts: 77 Joined: Mar 22^nd, 2024	Re: Duplex loads for 40-50 SBN Reply #7 - Mar 4^th, 2025 at 6:54pm	Print Post
	Today I took some of the information from the replies and went to the range. Shooting a Remington rolling block, single set trigger, 40-50 SBN, I tried various 260 grain bullets over 3 gr of 4227 and 50 gr of goex #2F. 100 yards. Quite good. My goal is to get a load for 200 meters. So question. Do you recommend putting a thin piece of paper wad over the 4227 followed by the black powder? I just poured it in. Thanks


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Smoke Oldtimer Offline Posts: 750 Location: San Diego Joined: Feb 24^th, 2013	Re: Duplex loads for 40-50 SBN Reply #8 - Mar 4^th, 2025 at 8:03pm	Print Post
	I just drop the black on top of the 4227.

	Never be afraid to try something new. Remember, amatuers built the Ark, professionals built the Titanic.
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