Never have lubed my pellets, but Mac-1 has a page about it on their website saying it's a good thing for PCP's.....(shrugs) I dunno?! I bought some RWS Heavies last night at Cabellas. They are 9.6 grain wadcutters, very uniform looking, clean, etc.... my Talon and my Supersport both like them pretty well, but I have not tried any long distance shooting. I will try Kodiaks next I suppose, have you tried any .177 Kodiaks in your rig, or are you only a .22 guy?
Nitrogen would work out well I would think, and if your gun catches fire and explodes the Nitrogen will put out the fire.....double bonus points!
Could try looking at military surplus for an old Nitrogen servicing cart regulator, they service aircraft accumulators and tires with Nitrogen. Dunno if maybe a welding supply house would have something too? Dive shops might, but would be most expensive I would think.
Today I bedlinered my NEW grip and forend for my talon. It is now wearing a 18" .177 barrel and frame extender....I figured if I was gonna go 1/2 redneck with this gun, I may as well make it a full redneck bedliner conversion:) I was planning on doing some chrony strings this afternoon to get my fill/tophat spacing figured out, but Joel came by this afternoon and forgot to bring his chrony......likely story (Joel, if you're reading this Steve shot your chrony, it wasn't me!)...hehe!!!