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Old February 19, 2013, 02:31 PM   #2
Bart B.
Senior Member
 
Join Date: February 15, 2009
Posts: 4,830
603country, three shot groups have a 15% to 20% chance of representing what a 50-shot group will.

Shoot more shots per test group; at least 10, else your data's not statistically significant and far from being what's good to make decisions on.

If you still think 3-shot groups are good enough, prove it by shooting 5 of them with the same load. Then let me know which one you pick to represent the accuracy of that load.

Basics of testing ammo: if all the groups shot with a given load are different sizes, you're not shooting enough shots per group to get meaningful info on that load.
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Last edited by Bart B.; February 19, 2013 at 02:37 PM.
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