Getting ready to do an ammo accuracy test for my Tikka T1x that I am using for NRL22. I am told that the T1x is relatively insensitive to ammo type, if so, these results might be reasonably extended to other rifle types, maybe. I will be doing a single group of 35 to 40 rounds and generating dispersion statistics. I will be measuring barrel temperature with a thermocouple to look for and normalize any temperature related effects. The list of ammos that i am using is shown below. I would love to add some more including Eley Match, SK and Lapua ammos but I cant find any. If you know where i can get some let me know or send me anything you want tested, wink, as im about $400 into this. I included a few boxes of super cheap just out of curiosity. I have Tenex from three different lots to see if there is anything statistically different between them. Ill post results as I generate them but realistically i dont see being done for a month as I will only be shooting when there is zero wind. Any thoughts?
I will be watching with extreme interest… sounds like a fun project!
Looks like a cool project!
I am currently just working through my process, developing my tool chain and workflow. I managed to score some Eley Match to add to the experiment.
Here is a picture of two groups of two, which I will combine into a larger virtual group of 4 to generate better statistics. I decided on a 36 shot group for my final shot group size.
Below is the combined group and the associated statistics. The data I am most interested in is the 90% and 95% CEP, which tells me that 90% or 95% of my shots will be within the listed MOA.
Velocity will be included, its a manual process but I haven’t forgotten it. Any comments?
Cool. What software are you using to do that–with the overlay of groups, etc.?
Alex, I’m using a program called OnTarget for the shot analysis. I am open to other possibilities as it doesn’t look like it is maintained anymore. I’m recording the velocities with my Caldwell G2 app and manually entering them into this application. Pain. 
I will be uploading a full test of Norma Tac22 in a few minutes, working on it now. Maybe one day I will write my own program if I cant find an alternative.
Norma Tac-22: Control case because I have thousands of rounds of this.
Summary: 90% of the time it will shoot within .998 MOA. Not bad for a $3.99 box of ammo.
36 Shot Group:
Statistical Analysis:
Note that the scope clearly wasn’t zeroed and that the offsets in the data give valid statistical information on how I should adjust the scope.
Eley Force: $5.25 / 50 rounds
Summary: 90% of the time Eley Force will shoot a 1.038 MOA group. I felt overall that the Force was shooting better, but when Eley had a flyer it was a doozy of a flyer. Indeed if I through out the two big flyers it performs marginally better than the Norma Tac. BUT the data doesnt lie and Eley Force is no better than the Norma Tac.
Also, the velocity distribution of the Eley was way better than the Norma Tac, with a 9.2SD vs 13.3SD. This will make the Eley Force much more consistent at long rages.
Shot Data:. Shot 2 was done again because I sneezed. Shot 11 was shot at bullseye 10 so i moved the impact to bullseye 11.
Statistical Analysis:
CCI Standard Velocity: $3.99 / 50 rounds
Summary: CCI standard velocity takes the lead. Pretty impressive for a $3.49 box of ammo when on sale. This ammo will shoot .788 MOA groups 90% of the time. This might have to become my standard plinking ammo. The velocity statistics are not as good, so at long range this ammo might start to suffer but for standard plinking ranges this is very good.
Shot Data: I forgot to shoot target #36 so the statistics are based on 35 shots.
Statistical Analysis
Ha, seems that CCI standard stuff is still one of the best for the $
Is this gun brand new? Did you do a barrel break in? What are your cleaning procedures between shot strings? Just things that come to mind as I’m looking at all this data.
Its a brand new rifle. A barrel break-in for a 22LR? No, its a waste of time. For that matter its a waste of time for any caliber. Some of the best shooters in the world like Erick Cortina don’t break in their barrels and I have yet to find one shred of actual data that proves this is necessary. If I can find real data that supports the break-in process then I might adopt it, but until then its just superstitious hooey.
I cleaned the barrel to get out shipping grease and any particles that might have been in the barrel from the manufacturing process, inspected it with my borescope and then I shot it. I clean the barrel between each box of ammo and then I put 10 sighting rounds through before I start collecting data.
Barrel break in is very real. I’m not talking about firing so many shots the clean the fire more then clean. That is mostly hog wash. I’m talking about a barrel settling in after a few hundred rounds. Your velocity’s will steadily increase until they plateau, at this point you have a proper broke barrel. This is a commonly known issue. Your test is flawed if you haven’t reached the settlement or breaking in phase. You should throw away at lest a couple hundred rounds before starting your real test. I would be willing to bet if you reshot the first three boxes of ammo or maybe four you will see different results. 