Winchester mod. 12
I have a older 1928 Mod. 12 .16ga that has a slight wiggle/wobble at the barrel-reciever twist connection point, how do I tighten this up ? Thanks for any help.
0
-
The Blue Book adds value for a "milled" vent rib. Can you explain the distinction or tell me where I might see an example the "milled" version. Thanks 0 -
Hello ozbud,
Welcome to the forum.
I believe that the milled rib was actually machined as part of the barrel. A very labor intensive process. Vent ribs are soldeded on to the barrel. Mossburg is now using epoxy to install ribs.
There are a couple of other guys on this forum that may be able to give a more complete answer.
Hope this helps.
Taperloc.0 -
Welcome to the forum ozbud. The Md 12 came with two styles of "Milled" ribs, the 2 pin and the 3 pin. Look at the rib post behind the Magazine band. You can see 2 or 3 pins about 1/16th of an inch in diameter. If you were to remove these pins the rib comes off, and on the barrel, you will see little machined nubs. It's actually half a dove tail, the other part is on the bottom of the rib post. All 2 & 3 pin ribs, (Milled) came with the large receiver ramp known as the Duckbill ramp. Winchester only put these ribs on Trap, Skeet, Pigeon, and Black Diamond grade shotguns. In the early 1950s, they stopped marking the guns with Trap or Skeet, since it was assumed people knew it was a Skeet gun, because the barrel was marked WS 1, and Traps mostlyly had 30 or 32 in Full Chokes by this time. Anyway hope this helps you. Regards Dave 0 -
Great info Dave.....I learn something new every time you post!!!Thanks
Love them Pre-64's!!!!-Bob0 -
Are we sure he is not asking about a milled (solid) rib? Model 12's also came with a solid rib that is milled directly on the barrel. There will be, of course, no vents. As discussed earlier there are several variations of vent rib but, I am only aware of one solid rib. 0 -
RDT: Actually Solid ribs are brazed onto the barrel. The barrel is set up into a fixture, then two grooves are cut into the barrel from the muzzle to where the threads start for the chamber ring, (chamber end). The rib is machined 5/16/s wide, and has a small radius on the bottom along with a rail on each side that fit into the grooves that were machined into the barrel. Then they ran the rib through the matting machine, then the rib was straightened, then brazed onto the barrel. Once the barrel assy. was completed they rust blued the barrel/rib assy. In 35 plus years of seeing, buying, selling and playing with Md 12s, I've seen only 2 Solid rib guns where the rib has come loose. Both guns were over 50 years old, so that is a testament to how good Winchester was at brazing on the ribs.
You have to remember when Winchester first started offering the "Solid Rib" in 1913, there were only conventional mills and lathes. It would have been almost impossible to to mill a barrel with a solid rib. When Numerical Machines came out in the late 1970s, (computer controlled machining, or CNC) it would be possible to rotate a barrel a 1/2 a thousanth at a time to generate a true solid rib, and a round barrel. Granted all barrels were forged in the Winchester Foundry, then sent to the machine shop for final boring, honing the bore, and final turning of the outside diameterand profile.
So with all that said, when you hear the term "milled rib" on Md 12's, it applies to the 2 or 3 pin version of the Vent Rib.
Regards Dave0 -
just a coment on the above, the solid ribs were soft soldered on. i've had to repair or replace several. 0
Please sign in to leave a comment.
Comments
7 comments