early US 7,62x51 mm variations

Some interesting variations and bullets were tested in the early pre NATO period and into the regular adoption period.

My photos from left to right:

1. L C 53 ball steel case
2. L C 54 A P
3. WCC 53 22 cal bullet on necked down 7,62 case
4. R A 58 helicopter m/g red wax tip tracer
5. WRA 59 green tip duplex (two bullets)
6. F A 65 white tip low recoil (M14 rifle)
7, F A 63 frangibleAttachment 138875Attachment 138876

Wouldn't that make number 3 a 243 Winchester?

Both the 22/243 and Page 240 are wildcats.

The 22/243 uses 224 dia bullets

the 240 Page (from Field & Stream gun editor Warren Page) used 7,62x49 cases
to form the 240 PageAttachment 138888