Simple Minded improved group size recording

[Sinclair]

Hi Lemonaid, hope you are ok. I read the very interesting article as per your link and I thank you for sharing it. It appears that 7 shots group is a good compromise when seeking for the best ammo/reloading/rifle matching. What I am not able to understand is how many groups ,for a any ammo/reloading sample, one should fire in order to get a meaningfull result?

Years ago, in a Sierra reloading manual discussion on group size and accuracy, Sierra technicians suggested shooting groups of 7 or 8 rounds. They found that this practice gave statistical results equivalent to shooting 100 rnd groups. As far as how many groups, I do not remember, but IIRC they only shot one group per test. The more shots fired, the more extraneous factors become significant statistically. As we are all aware, it is very difficult to duplicate the exact conditions, whether environmental, physical, or mental over a long string of shots.