Ok first I started with one shot spray, thought it was great till I got a shoulder gauge and shoulders were everywhere, sometimes I could feel a big difference in sizing force, so then I shook it and sprayed them up real good, let dry, started sizing, took a break, when I came back, i again feeling difference in force and then got stuck case, so done with that. Next lee lube mixed with rubbing alcohol, worked good but messy, had to use ultrasonic cleaner after, rinse then dry. Third was Hornady unique which works very well, little messy but can just wipe off, last I tried imperial case lube wax but found it less messy but harder to apply than unique so went back to unique. Just wondering what you guys think works best and what would you use on inside of neck as a lube between bullet and case, reason I ask is cause I came across some 223s I loaded over a year ago which shot fine then and now I'm getting a hard bolt lift when extracting the spent cases so I'm figuring the bullet created a little bit of a weld to the brass causing a pressure spike.