ASSRA Forum › General › Gunsmithing Single Shot Rifles › Octagonal 12 Bore Rifled Barrel
(Moderator Group: Moderator)
‹ Previous Topic | Next Topic ›
Page Index Toggle Pages: 1 Send TopicPrint
Hot Topic (More than 10 Replies) Octagonal 12 Bore Rifled Barrel (Read 8311 times)
iomskp
Junior Member
**
Offline



Posts: 55
Location: Cairns
Joined: Feb 20th, 2008
Octagonal 12 Bore Rifled Barrel
Oct 2nd, 2010 at 8:31pm
Print Post  
Does anybody know of a barrel maker that makes a full or half octagonal rifled 12 bore barrel.
  
Back to top
 
IP Logged
 
Schutzenbob
Frequent Elocutionist
*****
Offline


Rheinisch-Westfälisc
hen Sprengstoff-Fabriken

Posts: 2282
Location: Nightingale, California
Joined: Oct 24th, 2005
Re: Octagonal 12 Bore Rifled Barrel
Reply #1 - Oct 2nd, 2010 at 8:51pm
Print Post  
Let’s see, that would be .729 bore diameter, and a round ball of that diameter would weigh 1/12th of a pound, and since there are 7,000 grains to the avoirdupois pound, that round ball would weigh about 583 grains. Do you want it gain twist?

Bob
  
Back to top
 
IP Logged
 
iomskp
Junior Member
**
Offline



Posts: 55
Location: Cairns
Joined: Feb 20th, 2008
Re: Octagonal 12 Bore Rifled Barrel
Reply #2 - Oct 2nd, 2010 at 10:58pm
Print Post  
cotton reel paradox style projectile 750 grain with wheel weights, both my Greeners have a bore of .728.5, my brothers double paradox 12 bore both barrels are .735 dia, so I am looking somewhere around .730 as far as a gain twist I don't really know I have not given that much thought.


Regards Trevor
  
Back to top
 
IP Logged
 
John Taylor
Frequent Elocutionist
*****
Offline



Posts: 1851
Location: Lewiston, ID
Joined: Oct 23rd, 2006
Re: Octagonal 12 Bore Rifled Barrel
Reply #3 - Oct 3rd, 2010 at 1:10am
Print Post  
I have a 72 cal. rifled octagon barrel for a muzzle loader. will need to check groove diameter. Don't know who the maker is, took it in on trade. It is new.
  
John Taylor   Machinist/gunsmith
Back to top
WWW  
IP Logged
 
John Taylor
Frequent Elocutionist
*****
Offline



Posts: 1851
Location: Lewiston, ID
Joined: Oct 23rd, 2006
Re: Octagonal 12 Bore Rifled Barrel
Reply #4 - Oct 3rd, 2010 at 1:12am
Print Post  
ssdave, I'm looking for a barrel in the size you have but with a twist around 1 in 36. I got this idea of making a 97 Winchester into a 70-150.
  
John Taylor   Machinist/gunsmith
Back to top
WWW  
IP Logged
 
zrifleman
Ex Member


Re: Octagonal 12 Bore Rifled Barrel
Reply #5 - Oct 3rd, 2010 at 1:40am
Print Post  
Talk to Joe Williams at Oregon Gun Works. They have a web site.
  
Back to top
 
IP Logged
 
John Taylor
Frequent Elocutionist
*****
Offline



Posts: 1851
Location: Lewiston, ID
Joined: Oct 23rd, 2006
Re: Octagonal 12 Bore Rifled Barrel
Reply #6 - Oct 3rd, 2010 at 4:21pm
Print Post  
ssdave,
Strange that someone ells would have the same idea. I did have an 87 for a while but money got tight and it went down the road. I have several 97s that are in various stages of disrepair. I should just go ahead and make a barrel but that would involve making a reamer and cutter box for the rifling machine, and that takes time which I don't seem to have a lot of. Maybe I should make two barrels as there is an old break open shotgun in the shop that is missing the barrel.
  
John Taylor   Machinist/gunsmith
Back to top
WWW  
IP Logged
 
Cat_Whisperer
Frequent Elocutionist
*****
Offline


No 1, 9.3x74R

Posts: 3987
Location: Mountains of Virginia
Joined: Apr 17th, 2004
Re: Octagonal 12 Bore Rifled Barrel
Reply #7 - Oct 3rd, 2010 at 9:08pm
Print Post  
ssdave wrote on Oct 3rd, 2010 at 2:52pm:
John,
...  It seemed like a neat idea at the time to build a large bore single shot, 
...
dave


That's why I had matching cylinder bore chokes made for my 10ga side-by-side.  Now to make the 2 to 2-1/2oz slug mould.   Cheesy Cheesy Cheesy Cheesy Cheesy Cheesy
  
Cat Whisperer (trk)
Chief of Smoke
Pulaski Coehorn Works and Skunk Works
Drafted May 1970, Retired Maj. U.S.Army
assra #9885
Back to top
WWW  
IP Logged
 
screwloosetc
Ex Member


Re: Octagonal 12 Bore Rifled Barrel
Reply #8 - Oct 3rd, 2010 at 11:18pm
Print Post  
There are a lot of high quality 12 ga. slug barrels available could you use one as a liner? Model 12 trench gun is an awsome weapon when loaded with slugs
Tom
  
Back to top
 
IP Logged
 
Spud
Oldtimer
*****
Offline



Posts: 525
Location: Australia Oz
Joined: Feb 24th, 2005
Re: Octagonal 12 Bore Rifled Barrel
Reply #9 - Oct 4th, 2010 at 12:54am
Print Post  
While not a 12 ga, I thought you boys might be interested in seeing this little gem. It's a Husqvarna Model 4 in 20 ga with a rifled barrel. The Rolling block action features twin extractors and the 31.5" oct barrel has a 1 in 72" twist (bore - .620 & groove - .662). Three leaf sights marked for 60, 120 & 180 (m ?). The rifle was in new condition when I found it and has a nice walnut shotgun butt. 

What's interesting is that while the barrel is marked 15.4 mm (20 ga) the shortened 20 ga brass case (1.84") is a slip fit for a .662 ball (16 ga). I shoot a modified conical (a bored out Lyman .662 RB) with 2 1/2 drams (approx. 75 gr) of Goex FFg. It is quite accurate with both the RB & conical out to 100 yds and is a FUN rifle to hunt with. 
Spud
  
Back to top
 
IP Logged
 
Spud
Oldtimer
*****
Offline



Posts: 525
Location: Australia Oz
Joined: Feb 24th, 2005
Re: Octagonal 12 Bore Rifled Barrel
Reply #10 - Oct 4th, 2010 at 1:06am
Print Post  
From an old catalogue.....here's the original 20 ga cartridge likely used in these rifled shotguns.

Spud
  
Back to top
 
IP Logged
 
iomskp
Junior Member
**
Offline



Posts: 55
Location: Cairns
Joined: Feb 20th, 2008
Re: Octagonal 12 Bore Rifled Barrel
Reply #11 - Oct 5th, 2010 at 4:49am
Print Post  
I have found one thanks for the help.

Regards Trevor
  
Back to top
 
IP Logged
 
rustyrelx
Senior Forum Member
****
Offline



Posts: 474
Location: Wallace Idaho
Joined: Oct 9th, 2007
Re: Octagonal 12 Bore Rifled Barrel
Reply #12 - Oct 6th, 2010 at 10:56am
Print Post  
Back in the 60's I had purchased a bunch of .577 NE brass and had the idea of puttuin it on a Sharps rifle. At the time one could pick them up at $200 to $400 for a good one. As I could not find a barrel with the appropriate twist I gave up on the project.  Cry

Hummm maybe I'll try a replica Sharps and try this again. Could be interesting....   Don    rustyrelx
  
Back to top
 
IP Logged
 
Page Index Toggle Pages: 1
Send TopicPrint
‹ Previous Topic | Next Topic ›
 
  « Board Index ‹ Board Top  

ASSRA Forum » Powered by YaBB 2.6.12!
YaBB Forum Software © 2000-2026. All Rights Reserved.

Valid RSS Valid XHTML Valid CSS Powered by Perl Source Forge

Page completed in 1.4888 seconds.