FIRING PIN LUBE...
IN MY MOST HUMBLE OF OPINION, NEVER EVER NEVER!!!
The lube is what really collects the crud and gums up the works even faster than normally. Also that lube will migrate downwards and guess where it ends up...on the sparkplug, where it merrily seeks out any crevices and penetrates into the cartridge and raises merry ol' hell with reliability and absolutely no primer sealing will stop it, and may even help it penetrate faster by giving it a "road" to run upon. ALL modern lubes are penetrating agents. They will do what they were designed to do.
Firing pins do not need lube, nor does any "striker system" need a lube job. TM