Just been doing a bit more research on the 760. For a short time after the war the made them in 30 M.1 & 22 Hornet. You blokes ever seen one in those calibres, bet that would be very rare. Also checked remingtons listing of calibres and no 250-3000, seems odd they offered them in about evrything else.

There is 2 in 300sav on G.B,

Johno