July 18th, 2020

Tuner TECH — POI Shift with Barrel Tuner Position Changes

Tuner Pascal Bukys Point of Impact shift test 6 PPC benchrest

6PPC Pascal Fischbach Bukys Barrel Tuner sine waveHave a good look at the photos below — this may be one of the most noteworthy target strings we’ve ever published. What you can see is the effect of barrel tuner position on point of impact (POI). You can clearly see that the tuner position alters the up/down POI location in a predictable fashion.

This remarkable 15-shot sequence was shot by French benchrester Pascal Fischbach using his 6 PPC fitted with a CG (Carlito Gonzales) action and a Bukys barrel tuner.

Pascal reports: “After [bullet] seating and load validation, I put the Bukys tuner on, screwing it out 10 turns. According to Carlito, the CG’s super stiff action-to-barrel fit gives a faster vibration modulus that is detrimental below 10 turns [position of the tuner].” Pascal’s procedure was to screw out the tuner 1/4 turn progressively from one shot to the next. He shot one bullet at each tuner position, with a total of 15 shots.

15-Shot Sequence with Tuner Changes
6PPC Pascal Fischbach Bukys Barrel Tuner sine wave
CLICK HERE to SEE Large Version of Complete Test Strip (All 15 shots in a row).

Left Half of Target Strip (shots with 1/4 rotation change of tuner in sequence)
6PPC Pascal Fischbach Bukys Barrel Tuner sine wave

Right Half of Target Strip (shots with 1/4 rotation change of tuner in sequence)
6PPC Pascal Fischbach Bukys Barrel Tuner sine wave

Pascal observed: “Note the point of impact displacement [from shot to shot] tracks clearly along a sinusoide (sine wave curve).” This is indeed notable and significant! This shows how the tuner’s ability to change barrel harmonics can alter the position of the muzzle as each bullet exits, resulting in a higher or lower POI. Pascal sent his results to Carlito Gonzales in Argentina for analysis.

Pascal poses this question to readers: “Guess which three positions Carlito recommends to try?”

Editor’s Note: While this target sequence clearly shows how tuner position can alter bullet point of impact, this, by itself, does not tell us which tuner position(s) are best for accuracy. That will require further multi-shot group testing, involving careful experimentation with tuner position (and powder charge weights). But for those folks who doubt that a tuner can make a difference on a short, fat barrel, just take another look at the photos. The up/down changes are undeniable, and noteworthy in the wave pattern they follow.

Shooting Set-up and Test Conditions:
Pascal did this test at an outdoor range under very good conditions: “This was shot at my home range, outdoors, with four Smiley flags. The range is a narrow cut in high woods. Wind was consistent with readable flags. I started testing the tuner from 10 turns out and on to 15. I recently… found a sweet spot very close to the rearmost position of the tuner, so the rigidity provided by this super long tenon (just short of 70mm) was not a reason to overlook the recommended Bukys tuning procedure.”

6PPC Pascal Fischbach Bukys Barrel Tuner sine wave

Permalink - Articles, Bullets, Brass, Ammo, Gear Review, Tech Tip 3 Comments »
July 18th, 2020

39th Annual BLADE Show in Georgia Cancelled

Alanta GA blade show 2020 covid-19 cancelled cancellation knife trade event

Another major outdoor industry event falls to pandemic pressures. The 39th Annual BLADE Show, scheduled for August 7-9 in Atlanta, Georgia, has been officially cancelled. The organizers hope to hold the event June 4-6, 2021 (next year), at the Cobb Galleria Centre in Atlanta, Georgia. IMPORTANT: Current Exhibitors and Ticket Holders will receive further instructions via email.

Posting on BladeShow.com, event organizers declared:

Unfortunately, we have reluctantly come to the conclusion that it is in the best interest of all concerned to cancel BLADE Show 2020.

Please know that we did not reach this decision lightly. Having been in daily contact with guests, exhibitors, local officials and the show venue for the past two months, it has become apparent that we cannot present a 2020 event that meets exhibitor and attendee expectations and BLADE Show standards.

While the state of Georgia continues to grapple with decisions about new guidelines and restrictions to deal with the pandemic, BLADE Show too recognizes its responsibility to ensure the safety and well-being of all attendees. BLADE Magazine and the BLADE Show staff appreciate the support we received from our many industry friends who worked with us to plan for the alternate August dates after we were forced to cancel the original June event.

What will blade and knife fans be missing? Check out this video from Blade Show 2019:

Permalink News, Tactical No Comments »