First of all, ditch the WD40, its a waste of time. I presume its the packing grease in the barrel you're on about. I just used the Hoppes solvent and patched the barrel until clean. The Hoppes Solvent only really softened the grease. If you google "cosmoline" - thats the packing grease - you will find out more. Alternatively, get Sean to do it for you!!
When I shoot my .223 I always give the bore a wipe down with Shell Helix 10W40 Semi Synthetic oil (available at all good petrol stations!!) and then just run a few patches through when I take it out of the safe again. I use motor oil becau