For those shooters that don't have to be HC at the shooting range or when just shooting your flintlocks, here is a cheap and very usable pan primer. Get a 1 oz Oval flip top plastic bottle similar to what wind detection powder comes in at Archery suppliers. Can easily be bought on the internet from several sources. Fill it with your favorite priming powder and you have a primer that will fit any size pan. Small, compact, waterproof and won't leak powder.
