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Definitely keen on those , need to get the bore measured properly first though which I admit is above my pay grade , i believe you can swage down a .323 bullet as well as another option , sorry...

Oberndorf Mauser , post WW1 , I think late twenties , yes supposedly after WW1 they went to .323 but they must of had some smaller barrels still that slipped through , I have only used a micrometer...

I have a 8 x 60 that I have not shot yet , need to slug the bore though as i think it’s a .318 bore which really sucks