I start out at 13 yards and want the rifle dead on. Then back to 25 yards to see where they hit. Since you have done all of that, you're ready to increase the distance. Next I move to 50 yards and shoot there. I like to put a white paper plate on a cardboard box. It shows up great, and I aim dead center on the plate to see where the rifle hits. If you like a finer point of aim, tape a multi colored 3x5 index card to the center of the plate. I often shoot index cards. I then move back to 70 yards and make sure I can place them at that distance.

Then to make sure I can if I have to, I shoot at 100 yards with my flintlock. I pay very special attention to my point of aim and trigger squeeze and again, shoot at that plate. If you can place them in that plate, you can hit the deer in the heart lung area. I like to add the index card at the longer distances to give mea POI.

Also those stick on bulls work real good. I have a pack of them when I shoot at paper targets. I have the 1", 2" & 3". The 3" in the center of that plate sticks out like a sore thumb. I rest my front site at 100 yards cutting that circle in half and fire. Normally I can hit that 3" bull or just on the outside edge.