The super box is just what theyre kept in by whoever sold them. The box has "80gr Soft Point" on it, and i think it says "243"? But has "400 Purdy" stickers over those numbers and i dont want to peel it off to see. It also says "Ammunition" but has "Unprimed Brass" stuck over it.
The cases are Bertram 3" Nitro (what the headstamp says)

Huvius - the 3" case drops straight in

Les - thanks for doing the chamber cast and slugging the bore, you are a Godsend.

May have to be my go to gun when i'm out fossil collecting - always see foxes and the odd lone pig (and always within 10meters)