Calibre Options for Ross M10 factory sporter?

[mike webb]

Will check for serial number. Don't think there is one from memory. Buttplate is M10, Checkered steel with spur on top. Stock has two lightening holes drilled under buttplate and is marked M10 in ink under buttplate. Has the M10 mag and floorplate. Magazine is blocked internally at rear to accomodate shorter 303 round. I'm thinking a made up job but done by someone who knew a thing or two about Ross rifles. Contour of barrel is identical to the .280 which would involve a fair amount of lathe work. Anyway no one else will have one just like it at deer camp. Something to be said for that if you are a rifle nut like me. In the process of redoing the whole thing. Sourcing a long tube Weaver K to suit wide spacing of rings and for a more period look. Will post pics as it evolves if anyone is interested. Thanks for the input, Mike