Yes, there's a huge difference between "pfft boom" and "pfft.........boom" or, even worse, just "pfft" with no "boom". The quality of the lock, relationship of the pan to touch hole, amount of powder in the pan, vent picking, sharpness of the flint, hardness of the frizzen, and all the rest of the little things that go into being a flintlock shooter come into play. We all learned what makes our particular flinter shoot reliably or we sold the demon contraption and went back to something easier. I remember times when I wanted to go wrap the barrel of my first flinter around a tree. Like the time I set the rear trigger, settled the sights just behind the shoulder of a nice deer, tripped the front trigger, and got a "KERLUNK" instead of a "BOOM". Events like that lead to a greater understanding of why firearms technology finally produced the metallic cartridge. And yet those who master the flintlock often don't want to shoot anything else. I'm one of them.
It will really help if Vthompson will tell us the details of the flinter he has. There's a ton of help available.
John