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Author Topic: 40 Caliber Conical Bullet  (Read 262 times)

Online Mike Yancey

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40 Caliber Conical Bullet
« on: August 22, 2019, 07:41:12 PM »


Just cast a few bullets for a new 40 caliber that I'm getting ready to build. Going to build a Lehigh style barn gun. Colerain 42" A weight swamped barrel with a round bottom gain twist rifling. I have half as much in this mould as I will in the gun!
« Last Edit: August 22, 2019, 07:42:23 PM by Mike Yancey »

Online goingoldskool

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Re: 40 Caliber Conical Bullet
« Reply #1 on: August 22, 2019, 10:03:55 PM »
Those ought to do the trick! Sure hope they shoot good for you....
Good luck,  shoot straight and God bless,
Rodd

Offline doc nock

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Re: 40 Caliber Conical Bullet
« Reply #2 on: August 23, 2019, 08:23:05 AM »
Sweet! Someone was just educating me on a paper patched muzzleloader slick bullet, with a fast twist bbl, used prior to the BPCR era ushering in...

I agree with Rodd, that sucker should ventilate anything around... 2nd the wish it is accurate for you...

Offline Huntschool

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Re: 40 Caliber Conical Bullet
« Reply #3 on: August 24, 2019, 12:19:15 PM »
Mike Yancey:

Just sayin,  I hope you have conical twist in that barrel (1:48 or quicker) even with the gain twist and I would be interested to see how it shoots out of a round bottom grooved barrel.
« Last Edit: August 24, 2019, 12:20:25 PM by Huntschool »
Bruce A. Hering; AMM 761
Southeastern Illinois College (retired)

Online Mike Yancey

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Re: 40 Caliber Conical Bullet
« Reply #4 on: August 26, 2019, 07:45:20 AM »
Mike Yancey:

Just sayin,  I hope you have conical twist in that barrel (1:48 or quicker) even with the gain twist and I would be interested to see how it shoots out of a round bottom grooved barrel.

It starts out at 1 in 96 at the breech then gradually increases in the 42'' barrel to 1 in 48 at the muzzle. I have that twist in a 58 that will shoot both round ball as well as bullets well. The only thing with the different ball or bullet is the drop at distance with the big heavy bullets.

This rifle will be sighted in for only the conicals, I already have a 40 that it a round ball gun.
« Last Edit: August 26, 2019, 07:46:09 AM by Mike Yancey »

Offline Huntschool

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Re: 40 Caliber Conical Bullet
« Reply #5 on: August 26, 2019, 12:57:02 PM »

It starts out at 1 in 96 at the breech then gradually increases in the 42'' barrel to 1 in 48 at the muzzle. I have that twist in a 58 that will shoot both round ball as well as bullets well. The only thing with the different ball or bullet is the drop at distance with the big heavy bullets.

This rifle will be sighted in for only the conicals, I already have a 40 that it a round ball gun.
[/quote]

Sounds like that should work.  Would love to see some targets....
Bruce A. Hering; AMM 761
Southeastern Illinois College (retired)

Online Mike Yancey

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Re: 40 Caliber Conical Bullet
« Reply #6 on: August 26, 2019, 01:08:10 PM »
I will post some targets once I get the rifle built and sighted in. It will me a small petit Rupp style rifle.

Offline Monterey

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Re: 40 Caliber Conical Bullet
« Reply #7 on: September 03, 2019, 10:41:19 PM »
I don't like being the wet blanket but the twist rate is probably too slow for the bullet.  It might do better with a 1/18 to  1/25 rate.
Mike Lee