ASSRA Forum - Cartridge/bullet for 1/17 twist B. Darr Barrel

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Cartridge/bullet for 1/17 twist B. Darr Barrel (Read 376 times)

HG Participating Member Offline Posts: 34 Location: Jacksonville AR Joined: Dec 31^st, 2011	Cartridge/bullet for 1/17 twist B. Darr Barrel Jun 13^th, 2025 at 5:46pm	Print Post
	I have a new,.38 (.375") heavy (1.13" to 1.08") 30" barrel with a 1-17 twist. What cartridge , bullet combination would work well at 200 yards? as mentioned, it's a Barry Darr barrel. I have a high wall action with set trigger to compliment the barrel. Target work only. Thanks In Advance For Suggestions HG
	« Last Edit: Jun 13^th, 2025 at 6:50pm by HG »

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calledflyer Frequent Elocutionist Offline Posts: 3717 Joined: Mar 9^th, 2015	Re: Cartridge/bullet for 1/17 twist B. Darr Barrel Reply #1 - Jun 13^th, 2025 at 6:37pm	Print Post
	Maby the caliber would help.


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HG Participating Member Offline Posts: 34 Location: Jacksonville AR Joined: Dec 31^st, 2011	Re: Cartridge/bullet for 1/17 twist B. Darr Barrel Reply #2 - Jun 13^th, 2025 at 6:55pm	Print Post
	38 caliber,.375" bore. HG


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oneatatime Frequent Elocutionist Offline Posts: 4049 Location: Rocky Mountains Joined: Oct 30^th, 2011	Re: Cartridge/bullet for 1/17 twist B. Darr Barrel Reply #3 - Jun 13^th, 2025 at 8:09pm	Print Post
	So, HG, it's a 38-40 Rem or a 38-45 Ballard or a Bullard or a 38-50 Remington Hepburn or what;-) I think the question is what cartridge are you using?


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jhm Frequent Elocutionist Offline Posts: 1752 Location: georgia Joined: Sep 4^th, 2011	Re: Cartridge/bullet for 1/17 twist B. Darr Barrel Reply #4 - Jun 13^th, 2025 at 8:23pm	Print Post
	I think he is asking what cartridge would work with his barrel action combo. JMH


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HG Participating Member Offline Posts: 34 Location: Jacksonville AR Joined: Dec 31^st, 2011	Re: Cartridge/bullet for 1/17 twist B. Darr Barrel Reply #5 - Jun 13^th, 2025 at 8:30pm	Print Post
	Yes, new and unchambered barrel with slow twist. What is practical for 200 yard target work or is that not going to work with 1-17 twist. HG


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oneatatime Frequent Elocutionist Offline Posts: 4049 Location: Rocky Mountains Joined: Oct 30^th, 2011	Re: Cartridge/bullet for 1/17 twist B. Darr Barrel Reply #6 - Jun 13^th, 2025 at 8:32pm	Print Post
	Ah, so it's a to-do with a relatively slow twist. Classic for 200 would be 38-55, wouldn't it?


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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 11722 Location: Why, out West of course Joined: May 29^th, 2006	Re: Cartridge/bullet for 1/17 twist B. Darr Barrel Reply #7 - Jun 13^th, 2025 at 9:32pm	Print Post
	Yes, 38-55. Back when the 38-55 ruled the ranges they were 18 twist and that was considered fast. I also have a Darr barrel 18 twist that knocks rams over at 500 meters. Also on a Winchester 1885. My bore diameter is about .384. 7 groove right hand twist. Yes, 38-55. Brass is plentiful and easy to load. Huge bullet mold options. You will like it. My most accurate 38-55 at 200 yards has a 19 twist barrel. And it also knocks rams down at 500 meters.
	« Last Edit: Jun 13^th, 2025 at 9:58pm by westerner »
	A blind squirrel runs into a tree every once in a while.
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Schuetzendave Frequent Elocutionist Offline Retired Ex-Shooter Posts: 4137 Location: St. Albert, Alberta Joined: Jan 28^th, 2005	Re: Cartridge/bullet for 1/17 twist B. Darr Barrel Reply #8 - Jun 13^th, 2025 at 9:55pm	Print Post
	You need a bullet of a certain length to match your rifle barrel's twist. The gyroscopic spin (Sg) has to be at least 1.4 to ensure the bullet has enough spin to keep it from tumbling. For .38 caliber bullets with a 17:1 twist using Buffalo Arms bullets: JIM376330M3 Sg=1.38 1.375" long JIM376335 Sg=1.82 1.255" long JIM376360M1 Sg=1.27 JIM376360M2 Sg=1.26 JIM376360M3 Sg=1.24 JIM376360M4 Sg=1.27 Which means you can only use bullets shorter than 1.370".


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HG Participating Member Offline Posts: 34 Location: Jacksonville AR Joined: Dec 31^st, 2011	Re: Cartridge/bullet for 1/17 twist B. Darr Barrel Reply #9 - Jun 13^th, 2025 at 10:23pm	Print Post
	Thanks Westerner and SD. That was what I was looking for. I have enough silhouette rifles and this barrel is really heavy so I'm thinking bench gun and 200 yards. Wasn't sure what to expect with the slow twist and BP velocities but y'all answered my concerns, 38-55 it will be. Probably go with a Dual Diameter Paper Patch as I'm having good luck with them in .40 and .45 Thanks HG


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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 16849 Location: Oregon Joined: Feb 2^nd, 2009	Re: Cartridge/bullet for 1/17 twist B. Darr Barrel Reply #10 - Jun 14^th, 2025 at 9:49am	Print Post
	1:17" was very common for factory barrels, but most custom makers like Schoyen, Pope, etc. made their .38-55 barrels with a 1:15" twist. I have a couple Schoyen Ballards that are both .38-55 and 15" twist. I'd still choose the .38-55 as it's a great cartridge, and both cases, and dies are available easier than some obsolete cartridge choices are.

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