Sounds like several of you prime using those wee priming valves either on a brass flint primer or maybe installed on a small horn. I see "2 pushes" and "5 pushes" and such, but that doesn't tell me how much priming powder or what granulation is being used.
First, do you prime with 4f or 3f or 2f or something else, like pulverizing your own powder from coarser stuff?
Second, those little valve things come in two sizes that I know of. Are you using one that drops 3 grains or 1 grain?
I've got 5 flinters, all with different locks, different liners, one direct drilled. I use both Pierce white and Fuller black flints. While I sometimes try other powders for priming, ALL my guns work just fine with "2 pushes" from a 1 grain valve. Vent picked and clear. Final movement before shouldering the gun is to smartly tip the gun lock side downward (to the right for me cuz I'm shooting right-locked guns) to move the powder away from the vent.
Works for me. And maybe I'm just too lazy to experiment to see if there's a way to get faster ignition. For me, quick and reliable is what counts, and that is what I'm getting. I'm satisfied, so I'm keeping my routine. You should use what works for you.
I guess all this leads to: use what works. As has been said, "Your mileage may vary..."