Here is how the HS and cartridge appear:
The label on the case reads:
Win 224 E2
This looks like a military experimental leading up to the 5.56 NATO? The primer annulus has red primer sealant and the bullet is a FMJ so I am assuming Western Cartridge Company made this for the military.
The measurements in inches are:
Bullet diam. above neck: 0.220
Neck diam: 0.248
Shoulder diam: 0.353
Base diam: 0.372
Rim diam: 0.373
Case length: 1.771
The above are the approximate dimensions of the 5.56 NATO but the overall length is less due to the shorter bullet that was used to experiment. Is this an early prototype of the 5.56 NATO?
Does anybody know any history on this cartridge and if they do what is it? Also any estimate as to value for my records would be great.
Any information would be greatly appreciated.