When I lube the inside of case necks I do so one of two ways...

1. Pull the spindle out and give it a shot of Amzoil Synthetic Spray Lube....since each case neck has to pass thru the same spot, its easier to lube that...

2. put a bore brush on a pistol rod, and spray that with the Amzoil Spray Lube and run it thru each case neck... pretty simple, plus cleans any residual gunk in there out at the same time...

other lube works great I am sure, but I use the Amzoil, strictly because a friend is a dealer and I do some loading for him, and his 17 Fireball, so he just gives me a can or two when I need it...