[Mike Irwin]

I'd be very worried about adding any sort of wax or lubricant to my media on the off chance that it might reduce the ability of the case to grasp the chamber walls and increase back thrust.

During National Matches years ago it was a common occurrence for shooters to dip their bullets into Mobil1 lube before chambering. It helped cut down on the nasty fouling that occurred from cupro-nickel bullet jackets.

It was inevitable that some of the lube would migrate into the chamber and Hatcher notes a number of rifle failures attributed to increased case thrust on the bolt head.