Here is a photo of a 22rimfire case strike after I reshape the firing pin and modified to strike just inside the rim...
..did I do this correct?....your thoughts please...thanks
One thing to take into consideration is the angle on the outer edge of the firing pin tip. You are pushing a wedge shaped tip into the brass and deeper it goes the more it pushes brass out of the way, so if there is a big angle on that outside edge it can give you a false indication of how close the tip is to the edge is of the case.