The tuner changes the harmonics within the barrel. Something most important that you discovered is that the various settings traces a circle/oval. That reflects where the barrel was pointing when the round left the muzzle. If you choose a range of settings nearest the top or bottom of that circle you will get the best results in 'less vertical spread' within the group because the barrel is changing directions at these points. Going from top to bottom or vise versa. The next best thing to do is refine your load for the absolute minimum ES & SD's, even if it means loosing a few fps in doing so. A tuner is a marvelous thing, especially so in .22lrBR where we can't tune the ammunition like a handloader in centerfire does. The more you test with the tuner the broader understanding you get about harmonics...especially when you quit skipping so many setting in between tests. That barrel is doing many circles in between tuner settings...there are nodes hidden everywhere. Like you, I prefer to stay between 0 & 1 on my Harrells tuner....😎👍83
That is a VERY informative comment! I’ve heard about how the barrel whips around in circles, and trying to calculate OBT to release it out the top of bottom of the oscillation, but I never heard about how that effects POI with a tuner! Makes total sense. Thanks for that great info Charles!
John, mate, please have a close look at psychological effect called confirmation bias. It is something very prevalent in shooting community. Results are often attributed to real changes but are in fact driven by us on unconscious basis and found as something that we want to find all along. (Dr. Roberts, also shooter)
Great video John, a very good explanation of analyzing tuner results. For the visual learners tuner settings saved onto each group window would have been nice.
Thanks John, Best explanation of the EC tuner snd its settings effect POI. I didn’t find it tightened my groups more than the tuned ammo I settled on but it’s adjustments did open up my groups and POI. It’s also a terrific muzzle brake. Thank you!!
Thanks for the video John! I always enjoy them! This is a rookie question of course, but how do you get settlings like 22 and 34 on the tuner?? I thought they go out to like 10 or 12?
Each tuner is a little different but on my particular EC Tuner there are 24 marks on it so one full rotation would be considered 24 on my test for instance. 46 is almost two full rotations out.
My EC Tuner Brake has 0 thru 9 with half intervals so 19 marks per revolution. I test each number 0-9 and have noticed that circular point of impact shift as well. I never go more than one revolution and try to choose the best group out of those 10 groups (3 rnds) per group. In both of my tuner test, Zero was the best group which leads me to believe if seating depth is correct, the tuner isn’t necessary..
Yes but a little differently. It's not uncommon for people to choose one method or the other to save on components (seating or tuner) and I think you can get good results either way.
Absolutely. Keep in mind that I am using it on a 1.25 inch barrel but if you are going to get it for a 1 inch barrel you might want to consider his tuner that has a bit of a taper on it because it will look better on your barrel. I would reach out to them and tell them what you have and they will recommend the right tuner for you.
@@FClassJohn this is very good advice. After finishing up my build on a heavy barrel 6mm ARC bolt gun, I contacted Cortina Precision they advised the same thing since my barrel is just shy of an inch at the muzzle so it now wears the black V2 version and it tuned amazingly well with just the factory ammunition from Hornady (Black and Match only, Precision Hunter did not respond well). Thanks for another delightful video.
