I “bumped” 100 bullets the other day for shooting in a match tomorrow. I used STP as the lubrication for the bullets in the bump die. When I loaded the bullets I noticed they still had a thin film of STP on them ala liquid alox.
I have found that regular lubing of the bullets is sufficient and it isn't too much lube nor too little lube
I've read some of Tom Gray's old articles about lube purging and was left wondering “would excess STP film cause some bullets to fly outside the normal group?"
I wondered if anyone had any experience with this. In any case I'll have the answer by 1PM tomorrow afternoon.