The ES and SD numbers are indications of consistency only, not accuracy. If you get the numbers to coincide with accuracy, that's great, but don't count on that happening. Lots of others factors make up an accurate load. Group size first (five, five-shot groups, at least), then the numbers, if you have to have them. I seldom look at the numbers, something that has become quite a fad in recent years, along with neck tension.
Last edited by lotech; 02/23/24.
