Thanks for the reply Peter. No 4 is my goal.
I will do as much reading as possible but i do get sidetracked easily at times. I have done a fair amount of research but often find conradictions that drive me up the wall.
For instance i was told that all No 4's were fitted with 2 groove heavy barrels as standard ... therefore if very accurate new stock No4's were set asisde for "sniperising" then there would be Heavy Barrel 2 groove No 4 snipers.
So far all the no4 snipers ive seen all have 5 groove barrels ...... i need an assistant !