Thread: Rifle and reloaded ammo accuracy

Originally Posted by Feather or Shoot

The first shot counts, agreed. You don't statistically find out with any degree of certainty where your first shot is going to go by doing a three shot group. A ten shot cold barrel group like R 93 did is good. A five shot one would give you a less precise idea. A properly stress relieved barrel that doesn't wander as it gets hot is better.
Ballistipedia says six shots is the ideal minimum to ascertain how well a rifle shoots. That is from a statistician and a couple of doctors of physics.

My maths background tells me it is impossible to see a trend with any degree of certainty by using 3 data points. With four it's possible, and you can with 5+, obviously the more the better.

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What about 10+ 3 shot groups?

I dont think anybody here is calling one 3 shot group any kind of standard.