Ian
Notorious member
300BLK started the thread based on a different bullet than the NOE 190-grain one. Some guys wanted a 311279 copy, "ish", and made hash of it IMO.
A little story, Cliff's Notes: The 311679 was originally a solution to a specific problem with certain limitations. The problem was match accuracy with rifles having military chambers and particularly large chamber necks. The limitations were needing a relatively heavy bullet which would also feed from and fit in a magazine box, so the Eagan trick of putting as little bullet in the neck as possible was out, and filling the case neck with bullet creates more issues with misalignment at launch. To overcome the alignment and/or riveting issues that a neck full of bullet and excessive chamber neck clearance create, and since shrinking the chamber neck or thickening the cartridge brass necks enough to make desired minimum clearance were both impractical, Ardito's solution was to simply fill the chamber neck up with bullet. This introduced the issue of starting a .314" bullet into a .311" hole without shaving metal, so he simply throated the rifles to accept the larger driving portion of the bullets, and designed a bullet to fit this system. The bullet had a long, bore-riding section to guide the front, a concave, parabolic taper up to the first driving band which ensured centering and support of the middle of the bullet, and a couple of relatively narrow driving bands to stuff back into the case. Very clever. And it worked.
To make this work, the bullet needed to cast .314" on the bands and the rifle needed to be throated to accept the relatively large body portion without shaving off big rings of metal. Who does this? Not many. So Lyman started cutting the mould at .311" or so on the driving bands, I can only guess so that it would work in un-modified rifles. Well, that kind of defeats the purpose, but ok, they can still cash in on the name.
I'm still trying to figure out what that straight-taper nose and ridiculously long pair of body driving portions of the NOE bullet are supposed to fit or how it's supposed to work. I already designed that bullet (less the really long driving bands) years ago (AM 31-190X) and have a rifle whose throat and chamber neck fit it perfectly...and after publishing my experiences and re-discoveries with the "Morse Taper Fit" I'm a little puzzled why anyone else would want to continue that folly.
A little story, Cliff's Notes: The 311679 was originally a solution to a specific problem with certain limitations. The problem was match accuracy with rifles having military chambers and particularly large chamber necks. The limitations were needing a relatively heavy bullet which would also feed from and fit in a magazine box, so the Eagan trick of putting as little bullet in the neck as possible was out, and filling the case neck with bullet creates more issues with misalignment at launch. To overcome the alignment and/or riveting issues that a neck full of bullet and excessive chamber neck clearance create, and since shrinking the chamber neck or thickening the cartridge brass necks enough to make desired minimum clearance were both impractical, Ardito's solution was to simply fill the chamber neck up with bullet. This introduced the issue of starting a .314" bullet into a .311" hole without shaving metal, so he simply throated the rifles to accept the larger driving portion of the bullets, and designed a bullet to fit this system. The bullet had a long, bore-riding section to guide the front, a concave, parabolic taper up to the first driving band which ensured centering and support of the middle of the bullet, and a couple of relatively narrow driving bands to stuff back into the case. Very clever. And it worked.
To make this work, the bullet needed to cast .314" on the bands and the rifle needed to be throated to accept the relatively large body portion without shaving off big rings of metal. Who does this? Not many. So Lyman started cutting the mould at .311" or so on the driving bands, I can only guess so that it would work in un-modified rifles. Well, that kind of defeats the purpose, but ok, they can still cash in on the name.
I'm still trying to figure out what that straight-taper nose and ridiculously long pair of body driving portions of the NOE bullet are supposed to fit or how it's supposed to work. I already designed that bullet (less the really long driving bands) years ago (AM 31-190X) and have a rifle whose throat and chamber neck fit it perfectly...and after publishing my experiences and re-discoveries with the "Morse Taper Fit" I'm a little puzzled why anyone else would want to continue that folly.