As for telling me - or ANY of us - about firing full-load No5 rifles.......... Jeeeees, Groups of 3 or 4 of us Armourers fired hundreds of them and No4's all day, day in and day out range testing/re-zeroing them after being FTR'd prior to return and put back into Ordnance stocks. AND not even wearing shirts (or just cotton khaki green shirts as was the norn in the tropics). Just rolled up woollen socks on our elbows to prevent what we called 'nappy rash'............