CF,

When Rowdy says "No.4 Sporting RIfle" he doesn't mean it's a WW2 vintage "No.4 rifle" of the military pattern made at Maltby, Fazakerely, etc. That is something different. He is using the term that BSA used for their pre-war sporters...there was also a No 1,2,3 sporting rifle, plus one in .375 Nitro Express (not the magnum). These sporter numbers are purely a BSA thing; they don't correspond to the military designations for service rifles (SMLE No.1, No.4, etc). These BSA rifles were all based on Long Lee type actions or SMLE type actions.