Over here viewtopic.php?f=5&t=15627 @DingoDeerHunter suggested it is not possible to tune a rifle based on this video: https://www.youtube.com/watch?v=JSxr9AHER_s called "Science agrees: 5-shot groups are pointless"
I commented that the observation from Blackburn Defense that bullets do not hit the target according to a normal distribution is correct, but the rest of the Blackburn analysis is increasingly wrong. I noted, quite reasonably, that anyone who is shooting 4-8" groups (1-2 hands wide) @ 100 yards with both 22LR and Centerfire almost certainly needs to work on their marksmanship.
I then went on to try to explain (in layman's terms) why it is relatively easy to pick "out of tune" because the groups are big, and also observe the "in tune" area where groups are much smaller. Indeed I shared a target picture...
DingoDeerHunter wrote:I’m sorry you don’t understand the significance of the fact that the model is not a normal distribution and that you believe anecdotal evidence is significant.
This is like a kind of religion, and no amount of evidence will persuade y’all.
Be safe and enjoy
At the risk of ignoring “Never argue with an idiot. They will drag you down to their level and beat you with experience.” ― Mark Twain
If anyone's interested I'm happy to work through the statistics of dispersion that show the following:
# Yes, outliers exist...
# Yes, bullets do NOT hit the target in a normal distribution
# Yes, the more bullets you shoot the bigger the group > BUT < the more "accurate" your estimate of accuracy is
# Yes, more bullets do give a more accurate result, but there are diminishing returns
# Here we get to the crux of the matter - a gun that shoots well, shoots well most of the time and produces a (generally) small group
Unfortunately there seems to be a 5 image limit for uploads so the most interesting image is missing - namely the overlap between 2,3,5,10,20,40 shot groups for real (random) data that matches 2 rifles - one that shoots 1SD and the other that shoots 1/2SD.
If anyone wants the R code that generated this you are welcome.