Help with identifying .303 headstamps?

[Wrong Way]

Well, my original thread has turned into a discussion on AP ammo...so I'll repost here.

A guy gave me a bag of .303 ammo, and there are a few different headstamps: K32 VII, WRA49 303, GB 56 7,
RG 58 7, k 57 7, PS 1943, and C (triangle) 1970,

Anything cool there?

 

[recce]

RG is Radway Green = Brit issue.

 

[tiriaq]

K - Kynock
WRA - Winchester Repeating Arms
GB - Greenwood and Batley

 

[Wrong Way]

so...is there anyting "interesting" there...or all jusrt regular ball?

 

[cosmic]

Well - Its "corrosive" ball, if you consider that special...