I had one of those moments a few weeks ago, I keep my percussion caps in a fire-proof lock box that is cumbersome to easily get at. I wasn't sure how many caps I had in there but knew I had picked up some from a friend of mine that was going out of business. Another friend had died and his wife wanted to know if I needed any caps, I told her that I could always use a few extra caps especially if I could help her out. I bought an old stock box of 5000 CCI #11 from her and was trying to put them away, drug out the fire safe, opened it up and found that I probably have enough #11 caps to last a couple lifetimes of active shooting, not including the rolls or RWS #11 and RWS musket caps in cans of 250. Part of this stems from the shortage we experienced a few years back when CCI was trying to keep up with the demand for .22 ammo and short-changed us percussion shooters in the process. I vowed I would never get myself into that pickle again. We were getting desperate enough that one of the guys figured out how to make caps out of beer cans and stick-on cap gun caps, a lousy system at best but one that worked. That was one of the reasons that I switched over to flintlock for a period of time, which has had its own problems since it is dying out and we have lost major suppliers from England. Good flints can cost around $2 a piece and depending on your lock can be good for as few as a couple dozen shots to as many as a hundred. I have a friend that is so good at knapping flints that he shoots them until they won't clamp down in the jaws of his hammer (cock). He is so cheap that when my rifle will no longer be able to use a flint, I give it to him and he gets another week of shooting out of it. He has handed me back a flint when he is done with it and I swear they are 3/8" square and sharp on all edges, they just won't clamp into his jaws anymore.