Thread: 3 shot groups are useless!

Originally Posted by gimp

It is interesting and I have also been thinking about it.

The question that arises is "what is meant by genuine 0.1moa 5-shot rifles ?"

The definition of that is rather important.

Is it -

- Rifles that will occasionally shoot a 0.1moa 5 shot group, as part of the natural variation in group sizes (but with an average group size larger than that)

OR

- Rifles that produce, on average, 0.1moa 5 shot groups (meaning that the natural variation results in both larger and smaller groups from time to time)

OR

- Rifles that can be characterised as having sufficient precision to produce a high hit probability on a 0.1MOA target (disregarding the other aspects of hit probability)


Of course, the rifle itself is not the entire picture, the shooter error is part of it.

what would be interesting would be to see the difference in average group size (or mean radius of all shots in those composite groups) between Greg vs, in his words - someone not an idiot driving them. (not having a go Greg !)


It is interesting to observe that an average 5 shot group size for a benchrest rifle being shot by an expert is over .25MOA. Makes the idea of .25MOA hunting rifles seem vanishingly unlikely in reality.

It would also be interesting to plot all shots and understand the overall actual precision - as the average of multiple groups is less informative than one single large group

Haha - even .75 is nearly vanishing rare Id say.

But even experts get sucked in. I just watched Desert Precisions latest video, normally Kenny us pretty sound. But here are two consecutive 10 shot groups with a small but significant POI shift between them. Oh dear! And the irony, he's looking at 22 Ammo SDs with only 10 shot sample sizes