Ron, I have 3 flinters, had a 4th flint pistol and all have or do have a 1/16th or .0625 hole. Never a problem, all were coned on the inside as they where all liners except my trade gun,but it was still a .0625 hole. Depending on the gun I use 2or 3f for the charge and always so far 4f in the pan. No problems here. All are various makers,converted cva w/L&R lock, pedersoli rifle and pistol and unknown trade gun with a finely tuned LOTT lock on it.