October 4th, 2014

Fascinating Test Shows Tuner Settings Can Alter Point of Impact

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.

6PPC Pascal Fischbach Bukys Barrel Tuner sine wave

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October 4th, 2014

Rimfire Ammo Shortages — Debunking the Conspiracy Theorists

These days, when gun owners get together, the hot topic is: “Where did all the rimfire ammo go?” For the past couple of years, .22 LR rimfire ammo has been very hard to find, and what you can purchase is priced much higher than before. Is there some conspiracy? Have ammo-makers cut back production? Mark Keefe, Editor of American Rifleman, recently addressed these questions, and the related issue of production capacity.

Keefe observes that, if “normal” demand for rimfire ammo has increased substantially (and permanently), we may not see a big improvement in the availability of rimfire ammo until such time as ammo-makers increase production capacity. But that would require the construction of very expensive new ammo manufacturing facilities. According to Keefe, that’s not likely to happen any time soon because manufacturers will not spend hundreds of millions chasing a short-term demand “bubble”. In Keefe’s view, until the panic buying subsides, and ammo-makers can reliably determine the true, “normal” long-term demand for rimfire ammo, it is unlikely that they will invest in new factories.

Click Graphic to Read Full Article:
Keefe Mark rimfire American Rifleman

Here are some highlights of the Keefe Article on Rimfire Ammunition:

U.S. Rimfire Ammo Factories Really Are Running at Full Capacity
Keefe: “I have been in two of the major rimfire plants in the United States since this ‘crisis’ hit. They are, indeed, running three shifts, full out. But there are not that many rimfire plants in the [USA].”

Increased Rimfire Gun Sales May Justify Increased Production Capacity
Keefe: “There are, literally, millions more .22 Long Rifle firearms owned and shot that have entered civilian hands in recent years…. Variables such as a substantial increase in the number of .22s sold and a change in the type of .22s being shot … may make a new rimfire plant worth it. Time will tell.”

Construction of New Factories is Very Expensive
Keefe: “Would it be worth it to go to the expense of, say, building a $250 million rimfire plant to make your company’s money back at a penny a round over the next 10 to 20 years? The answer, so far, has been a resounding ‘No’.”

Manufacturers Can’t Assess True Demand Levels Until the Panic Buying Ceases
Keefe: “At some point, ammunition demand will reach its real level[.] At that point, the major ammo makers will look and see if there is sufficient demand for [bringing] a new rimfire plant on-line.”

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