Looks like I should explain more. I have gone through a 48 round charge test and a 30 round throat depth test. Now how is the best way to tighten My grops w/ a cronograph
I'm not sure I fully understand what you are asking, but you really can't use a chrono to improve accuracy. It can be used as tool to find the proper load by selecting for low ES and SD. Mostly, it just takes the guess work out of you velocity and makes finding your drops for longer ranges much easier.
