I believe that a flintlock's frizzen should snap up and out of the way under the tension of the frizzen spring once the flint has finished with its business on the face. That is generally about 3/8" off the pan. When a flint gets worn down - and been knapped a few times on the trail, I've found that a frizzen with a common spring, sometimes does not rotate. I have not noticed this fault when the spring is roller'd. I will agree that a good lock with a flint that nearly touches the frizzen in the half cock position, will strike high on the frizzen's face, and kick it out of the way, providing good ignition. My perception, and that may be all it is, is that the roller'd frizzen provides fasted action and therefore ignition too.
Jerry you may have a valid point, and Larry's testing of two locks, let's say Silers, otherwise equal, would be interesting.
