Made Special for the RAF 303 Cartridges

[browningautorifle]

Special for (aircraft) use usually refers to crimped in primers so they don't back out and jam a gun.

the headstamp, which was a 1939

Even earlier actually...1938. Royal Laboratories...

Information

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[usabaker]

Special for (aircraft) use usually refers to crimped in primers so they don't back out and jam a gun.

Even earlier actually...1938. Royal Laboratories...

Oh you are right 1938.. so a crimped primer pocket is the only difference in the WI? I just though is was very cool to find an unopened box.

thanks for the info Jim.

[browningautorifle]

a crimped primer pocket is the only difference in the WI

Well, that usually the story of the "For synchronized guns only" and use in aircraft. There could be other loading differences. Others will be along to tell... Maybe it's just that they are AP. .303 all seems to have crimped in primers.