I have used Imperial and it works just fine. It will remind you of a small tin of boot mink oil or shoe polish. As a matter of fact, you can use boot mink oil, or clear shoe polish and you will get about the same affect. I applied it with my finger to about every 3rd case for 223. The Hornady One-Shot spray would not work on that caliber for me at all.
I got into a kick a while back to see just what I could use for case sizing lube and found there were many household items that you could use, even bacon grease.
I used Pam, lard, bacon grease, mink oil, synthetic motor oil, lanolin, Lee's water base stuff (YUCK!), clear shoe polish. Even WD40 and Break-Away. All of them worked!
Now that I load on a progressive with a case feeder, it becomes a bit more challenging to get the cases prepared like they need to be. Imperial will not work in this loading scheme unless applied like one poster said, on a glove through a tub.
I chose to use RCBS II lube and a pad. I have had NO problem with this lube and no stuck cases. It is a little more messy but it surely works. But then again, so did everything else I tried!