The video can make a very positive impression on shooters looking to improve their results, especially at longer ranges. It promises better results with good ammo and better results even with ammo that doesn't group well.
According to Yannick (the guy in the video) from Canadian Precision Shooting, the tuner was tested with eight to ten different types of ammo and altogether some 500 rounds were tested in two different rifles, a CZ 455 and a Ruger Precision.
Yannick says the tuner doesn't change the ammo's muzzle velocity (MV) or extreme spread (ES). What the tuner does is improve the results of ammo that has good ES and SD (standard deviation), even if that ammo doesn't group well. The best results with the tuner come with ammo that already groups well without the tuner.
The video says the tuner is easily adjusted to the best setting by shooting five or ten shot groups at 50 yards and then identifying which setting produced the best results. According to Yannick, "for good ammunition you can expect from 30 to 45 percent better accuracy over not using a tuner."
With what is described as "bad ammunition" (which gave the least desirable results in the testing results, none of which are shown in the video) Yannick says "you can get 15 to 65 percent increase in accuracy."
The video notes the qualifier that the tuner may require some adjustment when shooting in different temperatures, such as between summer and winter.
What is very important, is that Yannick says that the tuner's impact on vertical spread seen at 50 yards is also seen at 200. He gives the example of a five-shot group at 200 yards in which the ammo ES was between 1014 fps and 1058 fps, an ES of 44 fps. According to the video, at 200 yards this ES alone would result in a vertical spread of three inches. Yannick adds a further expected one inch of vertical (.25 MOA) resulting from the "accuracy of the rifle" (around 10:30 in the video). According to Yannick, this means that a vertical spread of four inches is to be expected. The group itself was less than two inches at 200 yards (see image from video shown below). Yannick says this confirms that the tuner has a positive effect on vertical spread.
Yannick sums up the tuner's performance, saying that the tuner's effect at close range was reproduced at longer range. He concludes that "if you can get smaller group size at 50 you're going to get smaller group size at 200."
Below is the target shown in the video that offers confirmation that the tuner improves vertical spread at 200 yards.
I have a couple of questions that perhaps someone can help with.
The first is why do the bullet holes on the target appear to have such a large diameter? Below is a close up with the tape measure shown in the video as a scale. They look significantly larger than the holes typically left by a .22LR bullet. Are they .30" or more?
My second question has to do with the graph shown in the video at about the 10:30 mark. While the horizontal axis is unlabelled, the vertical axis is labelled "Bullet Drop (Inches) - Each line represents one inch change".
What is this graph supposed to show?
