Ammo identification help

[leetheman81]

Found a bunch of ammo i am having a hard time identifying. I am thinking it's 303 british but not positive. Any help would be appreciated

 

[leetheman81]

Trying to get another picture to upload but no service at the moment

 

[leetheman81]

 

[knifestuff]

.303 British gov't issue, manufactured by Royal Ordnance Factory, Radway Green, in 1956--hence the RG 56 markings. The 7 on the headstamp indicates original case was for MK 7 Ball ammo.

 

[97 winchester]

Do you have any mics or calipers? I didn't find any thru search.

 

[leetheman81]

.303 British gov't issue, manufactured by Royal Ordnance Factory, Radway Green, in 1956--hence the RG 56 markings. The 7 on the headstamp indicates original case was for MK 7 Ball ammo.

Thank you very much!!!