necking down

necking down

[′nek·iŋ ¦dau̇n]
(metallurgy)
Localized reduction in cross-sectional area of a specimen during tensile deformation.
References in periodicals archive ?
Necking down heavy cases--i.e., with thicker case walls--can only magnify the increased neck wall thickness often caused when reducing the case neck diameter.
Necking down can also result in all of the neck being too thick.
Derived by necking down the .375 H&H Magnum and fire-forming out most of its body taper, the 8mm is a true long-action magnum, eliminating its use in bolt actions designed for .30-06-length cartridges.
As you may have already surmised, I created these wildcats by necking down standard .50 BMG cases to .17 caliber.
ON Wednesday morning I got on to a packed Tube train and encountered a drunken youth necking down cheap wine.
You would think that necking down rifle brass to a smaller caliber would be simple and trouble-free, but that's not always the case.
I have encountered a doughnut ring formed at the junction of the case neck and shoulder when necking down brass.