An interesting question came up on the M-10 chambering. The only cartridge the M-10 or M1910 sporting rifle was chambered in was .280 Ross. Now, this does not mean all rifles with a receiver marked M-10 or M1910 was chambered in .280 Ross. Quite the contrary. The military version (MkIII) (with the receiver ring marked either M-10 or M-1910) will be found in .303 British. The E-10 Sporting Rifle (marked M-10 or M-1910) on the receiver, or the R-10 Sporting rifle marked the same on the receiver, will be found in .303 British or .35 WCF, and were not available in .280 Ross. Someone told me once there were eight or nine variations of the Ross rifle marked M-10 or M1910 - and only one is actually an M-10 or M-1910 (which was the .280 sporting rifle).

Last edited by Boltman; 08/07/20 03:52 PM.