I still have trouble getting real flint to work but when I do get a set up flashing I get like 20 shots before I have to worry again. Is this normal? Sometimes it takes 4-5 hits and readjustments to get a flint working right and some of the flints I try just don't fit at all. Today I had one flint that shattered half of it's face the first fall but it sparked so well we went on to shoot 20 trouble free shots. Is that about right?