How to measure a shot group: August 10, 2008

When you measure the group spread, don’t forget that most bullets except wadcutters will tear raggedly through paper instead of cutting a clean hole. You need to find the true edge of the two widest holes. In the beginning it helps to stick a pellet in the holes to visualize where the edges are. With some experience, it becomes easier to estimate where the edges are and you won’t have to use a pellet… Dirt E. Harry