Lyman Plains Rifle .50 caliber questions - Page 3 - The HuntingPA.com Outdoor Community
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post #21 of 30 (permalink) Old 12-16-2009, 04:34 PM
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Re: Lyman Plains Rifle .50 caliber questions

Mine loves 85 gr of FFFq over a .490 ball with .018 pillow ticking
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post #22 of 30 (permalink) Old 02-04-2017, 08:02 AM
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Originally Posted by Muab Dib View Post
I've got a Lyman Great Plains 50 Cal. flintlock and shoot 80 gr. FFF (3F)Goex black powder. I use a .015 Patch and a Hornady .495 lead ball. Prime with FFFF (4F) Goex. Shoot's plenty good. Better then me! You've got a good rifle there.

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Seems like a good solid recommendation from what I am reading. I'm trying to figure out the patching thickness issue as well, considering Lyman has deeper cut rifling than some. Thanks for this.
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post #23 of 30 (permalink) Old 02-04-2017, 08:12 AM
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Originally Posted by Bunky View Post
I agree with this as your mostly likely combo---however save the money on the 4F and load and prime with 3F that way you only need one powder---I have a 54 cal Great Plains and the 4F causes some problems at times with fouling around the touch hole...3F has never done this and I have suggested the same powder for both to many here who nowonly buy 3F for both----feel free to chime in fellers.
That's what I want to do. One horn of 3F, for the load and prime.
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post #24 of 30 (permalink) Old 02-04-2017, 01:41 PM
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I've got a GPR in .54 caliber. Its a 1/60 twist barrel. I'm assuming yours is as well, so round balls are what you want. I shoot a 225 grain, .530 ball with .018 patch over 80 grains of 2fg. I use the same load in my TVM Lancaster as well. Its got a 1/66 twist barrel. I prime with 4fg. I am getting 2 inch groups at 50- yards with that load, and killed a big doe with the Lanc this season. 40 yard shot and the ball went in one side and out the other. Dead deer.

Get yourself a Lee double cavity round ball mold, melt those conicals down and make some balls out of them.

If you had a faster twist, say 1/48 then I'd say use the conicals, but with the GPR it likes round balls.

Last edited by Blue Bird; 02-09-2017 at 11:47 AM.
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post #25 of 30 (permalink) Old 02-08-2017, 10:48 AM
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Originally Posted by Stikbow View Post
A good round ball load for my GPR 50 was a .490 ball, .018 patch over 80 grains of 2f.
I am going to try out the same set-up .490 over a .018 but I want to prime and load with the same powder.
Any idea what would be an equivalent charge of 3F powder?
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post #26 of 30 (permalink) Old 02-09-2017, 11:45 AM
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I am going to try out the same set-up .490 over a .018 but I want to prime and load with the same powder.
Any idea what would be an equivalent charge of 3F powder?
Simple, just switch to 3fg, then use same in the pan.
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post #27 of 30 (permalink) Old 02-10-2017, 12:07 PM
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Originally Posted by fireinahorn View Post
I am going to try out the same set-up .490 over a .018 but I want to prime and load with the same powder.
Any idea what would be an equivalent charge of 3F powder?
Replacing 2Fg with 3Fg powder is approximately at 80-85% powder by volume. Unless You have a fixed size measure, round to closest increment of 5gr. Powder measures that have metering on them are increments of 5.

100gr of 2Fg = 80-85gr. 3Fg (pick one, 80 or 85)
90gr. 2Fg = 72-76.5gr. 3Fg (75)
80gr of 2Fg = 64 - 68gr. 3Fg (65)
75gr. 2Fg = 60 - 63.75gr. 3Fg (pick one, 60 or 65)
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post #28 of 30 (permalink) Old 02-15-2017, 08:24 PM
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I have an adjustable range powder measure and a smaller adjustable one in my bag. Both measure in increments of 10gr.

The Investarm book who made my GPR says shoot .490 over 90gr. FFg or 70 gr. FFFg
The Lyman book says MAX. loads for the rifle are .495 over 110gr. FFg or 90gr. FFFg.
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post #29 of 30 (permalink) Old 02-22-2017, 09:34 AM
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I have a Deerstalker, with a bit shorter barrel. Dixon's said 70 grains 2F with a properly patched round ball was all you needed and they were right. I use 2F Swiss, .490 ball and a .020 patch. It loads with no problems and groups well. I shot a doe and broke her shoulder at 35-40 yards.
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post #30 of 30 (permalink) Old 02-13-2018, 09:16 PM
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Nice

Still use just 3f

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