Lyman Keith Bullets

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mtngun
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Lyman Keith Bullets

Postby mtngun » Wed Sep 30, 2015 1:52 pm

Lyman's prints for Keith bullets. This is dated 1981

358429
-- the front band is approximately 0.080" long. Supposedly the "authentic" Keith 35 bullet had a 0.100" long front band.
-- the middle band also looks to be approximately 0.080" long
-- the bottom band is 0.113" long.
-- the lube groove is 0.120" long, if you measure it my way.
-- the GtoB is 1.5
-- the crimp groove is 0.060" long
-- the meplat is 68%
-- the lube groove diameter is 86% of the bullet diameter
-- the nose length is 0.375" or 1.04% the bullet diameter. Supposedly the "authentic" Keith 35 bullet had a longer nose, possibly 0.445" long, intended to work with 38 special cases.
-- the lube groove angle is 60 degrees included.
-- to my eye it looks like there is a straight section before the ogive begins, but it's not called out on the drawing.
Image

And here would be a very close copy of the Lyman 358429:
Image

429421
-- the front band looks to be approximately 0.090" long. Elmer may have preferred it 0.100" long.
-- the middle band looks to be approximately 0.080" long
-- the bottom band is 0.107"
-- the lube groove is 0.127" long if you measure it my way
-- the GtoB is 1.5
-- the crimp groove is 0.055" long
-- the meplat is 64%
-- the lube groove diameter is 83% of the bullet diameter.
-- the nose length is 0.415" or 97% of the bullet diameter
-- the lube groove angle is 60 degrees included
-- to my eye it looks like there is a short straight section before the ogive begins, but it's not called out on the drawing.
Image

And here would be a very close copy of the Lyman 429421. I think the only thing Elmer would change would be to make the front band 0.100" long instead of 0.090.
Image

Although Elmer often talked about "equal length bands and grooves," bear in mind that he was a cowboy not a scientist so when he said "equal length" what he really meant was "kinda sorta equal length to the naked eye" :lol: so I would take that "equal length" stuff with a grain of salt. Elmer never actually produced a blueprint of his "authentic" designs. Supposedly he did have some steel "master" bullets made, but the alleged masters have not been shown to the public as far as I know.

Creeker
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Re: Lyman Keith Bullets

Postby Creeker » Mon Jan 09, 2017 7:21 pm

I have a set of those prints given me by Lyman.
Image

Image

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mtngun
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Re: Lyman Keith Bullets

Postby mtngun » Mon Jan 09, 2017 8:26 pm

You were probably the original internet source for those prints. :)

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Re: Lyman Keith Bullets

Postby mtngun » Wed Mar 08, 2017 3:06 pm

And then there is the 452424. A pic borrowed from the Boolits forum showing various Lyman 452424's that have been made over the years. Will the real 452424 please stand up? :lol:
Image

Years ago someone sent me a sample bullet from an H&G mold that they claimed was the "real" 45 caliber Keith bullet. I have no way to know whether Elmer would have approved of that H&G design, but in any event it looked similar to bullets #2, 4, 8, & 9, counting from left to right, with a short squat nose, a generous flat bottomed lube groove, and skinny driving bands.

Measuring those 4 bullets from the photograph I come up with:
OAL = 0.662"
nose length = 0.370"
meplat = 72%
all three bands = 0.060" long
lube groove = 0.110" long
GtoB = 1.8
crimp groove = 0.060" long

My design program rejects 0.060" long bands on a 45 caliber bullet (because they can be difficult to fill out). This was as close as I could come:
Image


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