You can secure the flint in leather or in sheet lead. I have tried both but prefer leather. With the hammer forward & the cock set at half-cock position, fit the flint in loose tightening the screw with just the fingers. Close the hammer [frizzen] over the pan. Release the cock by squeezing the trigger, but hold onto the cock & release it slowly.Text and photo from an impressively detailed and extensively photographed post at A Woodrunner's Diary, a blog of living history. Reading the post will give you a much greater appreciation for the skills of soldiers and hunters using flintlock firearms.