The Firing Line Forums

Go Back   The Firing Line Forums > The Skunkworks > The Smithy

Reply
 
Thread Tools
Old May 9, 1999, 03:19 PM   #1
tanstaafl
Junior Member
 
Join Date: April 26, 1999
Posts: 14
Anybody have an idea of the twist in my 223. caliber mini-14? Serial #188-xxxxx. I tried watching a marked cleaning rod with tight jag and patch as it rotated down the barrel but got varying measurements. I have heard these little jems were a fast 1-7" twist rate. yo. Thanks for any input. Stay safe.
tanstaafl is offline  
Old May 9, 1999, 04:50 PM   #2
4V50 Gary
Staff
 
Join Date: November 2, 1998
Location: Colorado
Posts: 16,535
The answer you seek is in the archives of the rifle forum. Do a search under Ruger Mini 14 and under my username and you'll find it.
4V50 Gary is offline  
Old May 9, 1999, 07:31 PM   #3
tanstaafl
Junior Member
 
Join Date: April 26, 1999
Posts: 14
4V50 Gary: Couldn't find a post about rate of twist by searching: Ruger mini 14, under your username, in the rifle forum, any date, But then, I am an absolute neophyte with this computer stuff so this may be completely operator error. Thanks.
tanstaafl is offline  
Old May 9, 1999, 08:17 PM   #4
Mal H
Staff
 
Join Date: March 20, 1999
Location: Somewhere in the woods of Northern Virginia
Posts: 14,479
I don't know if the rate has ever been different, but the mini-14 I am familiar with is 1 in 9".
Mal H is offline  
Old May 10, 1999, 09:22 AM   #5
George Stringer
Staff Alumnus
 
Join Date: October 12, 1998
Location: Earlington KY
Posts: 2,299
tanstaafl, according to published info the Mini-14 is 1 in 10. George
George Stringer is offline  
Old May 10, 1999, 01:23 PM   #6
Mal H
Staff
 
Join Date: March 20, 1999
Location: Somewhere in the woods of Northern Virginia
Posts: 14,479
George,
Are you sure? I know the Mini-30 is 1:10", but I just rechecked (Ruger catalog and Gun Digest) and the Mini-14 is 1:9".
Mal H is offline  
Old May 10, 1999, 10:11 PM   #7
tanstaafl
Junior Member
 
Join Date: April 26, 1999
Posts: 14
Thanks to all for the replies. When I tried the cleaning rod in the bore with a tight patch trick I got various results from one complete revolution of the rod in 8" to one in 10.5"...obviously some slippage and some binding going on. 1 turn in 9" fits the average pretty much. I'm thinking about trying some different bullet weights and wanted some idea on what rate of twist that short little barrel might be. Thanks again.
tanstaafl is offline  
Old May 10, 1999, 11:28 PM   #8
George Stringer
Staff Alumnus
 
Join Date: October 12, 1998
Location: Earlington KY
Posts: 2,299
MalH, I'm just going by what's listed in the Speer manual. It could very easily be 1 in 9 but they say it's 1 in 10. George
George Stringer is offline  
Old May 11, 1999, 06:04 AM   #9
Cat
Senior Member
 
Join Date: February 12, 1999
Location: Ohio, USA
Posts: 467
I'm pretty sure Ruger has changed the twist rate a couple of times. I had a series 180 Mini-14 that shot 1 1/2" groups with good ammo. I bought it back in the '70s. I think they went to a much faster twist for heavier bullets and have since gone to a more moderate rate. I'm not sure what the numbers are but the older ones shot 55 gr. bullets a lot better that the ones with the real fast rate.
Cat
Cat is offline  
Old May 11, 1999, 11:06 AM   #10
Mal H
Staff
 
Join Date: March 20, 1999
Location: Somewhere in the woods of Northern Virginia
Posts: 14,479
Cat, That explains it then. It was probably 1:10", then they changed to 1:7" as a lot of .223's were but they didn't work well with some of the newer varmint bullets, and now it's 1:9". Obviously, tanstaafl has one with a variable rate. Those are hard to find, but effective with any bullet.
Mal H is offline  
Old May 11, 1999, 11:28 AM   #11
4V50 Gary
Staff
 
Join Date: November 2, 1998
Location: Colorado
Posts: 16,535
Grumble grumble while I unearth my notes from Ruger:

Until 1987, the Mini-14 barrel had a 1-10" twist. It was then changed to 1-7" to stabilize the new 62 grain military bullet. The old 1-10" handled the 62 grain satisfactorily, but wasn't deemed good for the new tracer round.

Law enforcement agencies primarily use the 55 grain bullet and the CA Dept. of Correction complained that their Mini-14s would hold a 8-10" group at 100 yards and a 1-2" group at 50 yards. Ruger dispatched its Chief Armorer (my instructor) who examined the guns and ruled out the ammo. CDC had a national match level shooter who demonstrated that their guns wouldn't group.

So, Ruger procured firearms from Colt and concluded that Colt enjoyed no advantage over the Mini. Ruger engineers then concluded that the twist needed to be changed and sometime in 1996, the twist was changed to 1-9".

------------------
Vigilantibus et non dormientibus jura subveniunt

4V50 Gary is offline  
Old May 12, 1999, 03:54 AM   #12
Tallison
Member
 
Join Date: May 11, 1999
Posts: 38
I have 2 mini 14's one made in 1979 and one made in 1986 both have a 1 in 10.......
Tallison is offline  
Old October 16, 2013, 08:08 PM   #13
Travelin' Man
Member
 
Join Date: March 3, 2009
Location: Fox Lake, Illinois
Posts: 46
My mid '80s production Mini-14 shoots both 55 grain and 62 grain ammo with what I consider good accuracy for the 18.5" barrel, shooting 5 round 1" groups with the 55 grain bullets and opening up to about 1-1/4" with the 62 grain bullets. The only changes I've made to the rifle is to replace the wood stock with a Hogue overmolded one and installing a Leupold Vari-X II 2x7x40 scope with Ruger rings.
__________________
NRA Life Member - ΜΟΛΩΝ ΛΑΒΕ
Travelin' Man is offline  
Old October 16, 2013, 08:45 PM   #14
oldgunsmith
Senior Member
 
Join Date: January 9, 2013
Posts: 278
Mine was one of 640 shipped to Oklahoma Highway Patrol in March, 1979. 181- series. It's 1 in 10. It shoots in about 2 1/2" with good 55 gr. ammo, but I think it was "tuned" after it got here. Minis weren't known to be that accurate at the time.

Last edited by oldgunsmith; October 16, 2013 at 08:54 PM.
oldgunsmith is offline  
Old October 17, 2013, 07:39 AM   #15
cecILL
Senior Member
 
Join Date: August 13, 2001
Location: central IL
Posts: 467
Uh oh, a zombie thread.
cecILL is offline  
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 10:41 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2014 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Contact Us
Page generated in 0.08730 seconds with 9 queries