I have never handled a No. 2, but I believe they were single shot - I am sure my cousins were using them, or a similar conversion to a No. 4, in the Canadian Army Cadets in the 1960's. My No. 3 uses the same chargers as are used in the No.1, 4 and 5. Apparently, there were .22 conversions of the No. 5, then a No. 6, 7, and 8 - all of those being .22 conversions for cadets / training / target shooting competitions. The No.'s 1, 3, 4 and 5 were battle rifles chambered for .303 British. So far as I know, the Pattern 1913 (P13), in .276 Enfield, did not survive long enough to earn a "No." designation.