No bashing meant here. That presentation is going to be a tough one for anyone to refute.
To be fair, there's not really anything to refute. As was emphasized many times, "this is just what was seen by us." That doesn't mean that's all there is... it just means that's all they found. Secondly, I'd like to point out that trying to do tuner work with rifles/ammo that are only capable of 2-3" groups at 300yds is not adding anything to the discussion. If a tuner provider is claiming their product will provide a measurable effect for systems shooting that large, then they are absolutely wrong.
Yet people get so wrapped up trying to disprove anyone that has anything to say, that they don't realize the significance of the information provided.
Some of the info presented in that video tracks exactly with my findings. For instance, hanging a suppressor on the muzzle almost universally improves the group sizes. All of my rifles over the last couple decades shoot better with suppressors than without. So rather than get sucked into the natural drama trying to figure out if tuners work, people would do well to understand that merely having the tuner or suppressor on the end will likely result in a net positive. So if we're wanting to hang something on the muzzle, if not a tuner, and not a suppressor, what are we supposed to hang?
The natural next evolution of testing would be rather than focus on moving the tuner settings... to change the tuner weight and the material the tuners is made of, as well as tuner design variations.
The video might also conclusively prove that they lack the ability to prove why tuners work, rather than prove they don't work. (at present anyway)
There is no question at this point that they work. Tuners absolutely do work and this can be demonstrated pretty readily, and it is not all just confirmation bias or small samples either.
I have not been able to conclusively prove that adjusting tuner settings work on centerfires, but I have proven without a shadow of a doubt that
they work on 22LR. Dozens of different rifles I've done tuning sessions on have demonstrated a very distinct change in performance across the range of tuner settings. My sample sizes when doing this work made those used in the video look comically small. A typical ammo lot testing phase and subsequent tuning phase on a single rifle consists of 1,500 to 2,000rnds, minimum. My personal rifle was somewhere around 4,000-4,500rnds. Simply hanging the tuner on that rifle pulled roughly a tenth of an inch out of my avg group size at 50yds. Those that were here when I was doing the 6x5 stuff may recall that being documented with video evidence in real time. The rifle was shooting in the high .2's and low .3's without the tuner... but shoots consistent .1's and .2's with the tuner dialed in. Well at least it did. I haven't shot it seriously on paper for a year. I've been strictly in centerfire mode the past year. I had it on paper when I let a customer shoot it a few months ago and it cut tiny little bug holes still, so I'm sure it's fine.
Yet trying to prove tuner functionality on a 22lr that was shooting .6's and .7's at 50yds would be a fools errand. Also, completely converse to centerfire... hanging a suppressor on a rimfire almost universally damages its performance.
So just because they aren't currently seeing the effect, or are able to explain the effect, does not mean the effect does not exist. I'm only 8hrs from hornady... so if they'd like me to bring some high end rimfire stuff and do a pod on it, we can make that happen. Personally I'd rather do a pod on primer seating and ignition... but I'd be happy to contribute to the community good on the subject of tuners.
It's my contention that tuners work. I've seen them improve shooting, and I've personally witnessed the different settings on the tuners improving performance. The video leaves me with more questions than answers in that regard. Clearly there is much more to uncover.
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