Great shooting Chris! Looks like you’ve made harmonic tuning a lot easier. I’m getting about the same accuracy with my .25 Impact X w/PP and NSA 43.5 at 885 to 890 FPS. But it’s taken me hundreds and hundreds of slugs get there. BZ on the tuner!!!
Mike
Thanks Mike! Ya if nothing else, this method saves a TON of ammo! I am lazy when it comes to tuning and I like things being easy. Plus I have interviewed a few high level competitive precision shooters who hand load their own ammo (powder burners) and they will tell you that when you find that perfect primer / powder charge combo that gives you super tight SD / ES with your velocities - DON'T MESS WITH IT! That was an AHA! moment for me in all of this....
Up to this point we have been tinkering with our power wheels and hammer spring settings chasing a harmonic accuracy node, but what we are also doing during that process is ever so slightly changing the harmonic signature of the platform by changing the velocity. The harmonic tuner isolates JUST the barrel harmonic aspects of the platform. During this discovery process I have become a disciple of SINGLE VARIABLE TESTING!
Did you see any drift in harmonics with temperature change?
You 100% see change in harmonics due to temperature change. Hell, you see harmonic differences by putting a sun shade on your scope vs NOT having sun shade. Every little thing affect harmonics. My friend Dan Lowe who competed in the Brazil Olympics, shot for the ARMY Marksmanship Unit and got into airguns and then turns around and wins big bore at EBR was telling me that they literally clock and mark EVERY SINGLE BOLT with white paint on their rifles to ensure every single thing stays the same as to avoid harmonic differences. That was my approach in designing this device was to be able to adjust and manipulate the harmonic signature of your platform at the most microscopic level.
Furthermore, this may sting to talk about it a bit, but it is why Ted Bier didn't do that great at RMAC a few years ago. HIs suppressor wasn't tensioned down. In Ted's defense that reason was real and replicable. PJ Clark from Wisconsin Airgunners and I had been doing quite a bit of research in even changing your suppressor to the next size large just to see what affect it had. Just moving from an Tanto to a Sumo changed groups a lot at 50 rounds and beyond. There were a bunch of people online saying it had to do with airflow around the projectile (which I think is total malarky) when in actuality it has everything to do with the fractions of an ounce of weight change at the muzzle. This reinforced my findings of shifting the center of gravity just microscopic amounts can change your POI and thus being able to control it. The dampening aspects we baked into this was based on a TON of research I did with Limbsaver deresonator devices and even rubber drain pull plugs put onto air gun barrels. Years went into this project. So cool to finally have it OUT!
