I shoot muzzle loaders most of the time, a couple years back I decided to build a flintlock from one of Kibler's Southern Mountain Rifle kits. I committed to master the flintlock after winning the annual top shooter with a percussion rifle. I knew I would have to burn through at least a pound of priming powder to finally master a flintlock. The problem with a flintlock is the delay between trigger pull/pan ignition/and subsequent main powder charge going off. Good flintlock shooters can tune the action to get a real fast ignition but there is still that delay. I got to the point where I didn't really see the flash, only heard the boing of the frizzen being knocked out of the way by the cock and flint. A guy that knew more about flintlocks than anyone I knew told me the closest thing to a flintlock for delay is a spring loaded air rifle. He told which model to look for and as luck would have it another friend likes to rebuild them and had one for sale. Look for a quality rifle if you have the cash, mine is a Weihrauch, in .177. They are quality firearms and you need to find out what size pellet works best, they are all different. I had a set of International sights left over from a .22 project that got a scope and mounted them on this rifle. I like to throw a few spent shotgun shells on the berm of the 25yd pistol range and chase them around when I get tired of tearing small holes in a target. In the winter I stay up on my off hand shooting while using it in my big shop outside. I made a bullet trap out of some plywood like a box with a couple layers of a type of clay used by guys in the electrical trade when they need to plug up a hole in a wall with conduit, it has a fancy name like "duct seal" but stops those pellets cold with no chance for a ricochet.
I grew up with a bb gun like most kids, advanced to a pellet gun, this thing is no bb gun. It is a seriously accurate firearm, inside twenty five yards anything I can see I can hit, over and over.
That friend of mine that rebuilds them will spend an hour or so a couple times a month, usually brings in a target with the centers tore out. A spring loaded air rifle is harder on a quality scope than a 300 Win Mag, it has to do with the action of the spring. You have to use a special scope on a spring loaded air rifle.