Lube...
Pistol Ranch--I used to use RCBS lube on a pad. Switched to Imperial Sizing Die Wax. I think the Imperial is more "lub-y" than the RCBS (cases slip in & out of the FL sizing die slicker) and it is no more of a hassle to use.
col. Townsend Whelen recommended using "just a suspicion" of lube inside the case neck, and accomplished that by lubing every 4th or 5th case neck. This would be using anhydrous lanolin--there weren't dedicated case lubes in his day. I followed suit with the RCBS lube and it worked fine.
Imperial also puts out a "dry neck lube" which appears to be powdered graphite, and which I use by just pushing the case into the graphite, neck-deep. It works for lubing the neck of a case to be FL sized in a standard die. This results in no lube residue left inside the case, and many rifle powders are graphited anyhow, so that doesn't count as an adulterant of any sort.
You hear both positive and negative things about Hornady One Shot. Haven't tried it, and since I have something else that works, probably won't.
So: Recommendation for lube: Imperial Sizing Die Wax. Recommendation for inside neck: Imperial Dry Neck Lube. Frequency of neck lubing: Every 3-4 cases. OTOH, the RCBS lube works fine too if you want to use that.
Good luck in your quest for the absolute perfect case lube. Let us know if/when you find it!