I tried Pam yesterday to lube some 30-40 cases. I just sprayed them like I do with Hornady One Shot, tried to be careful, but got they pretty wet. As I was only neck sizing they were probably over lubricated but they sure sized easily. Cleanup took a while to wipe them dry, then I wiped out the case mouths with Q-tips.
I wonder if it might be better to apply it with a q-tip after spaying it into a disposable cup? Possibly lubing in the case mouth with a wet q-tip.