is washed out and at least 3,500 rounds of hot loads have been fired through

a bullet into a rapid spin) is the reason Long's equations work.

may "catch up" to the bullet before it exits the barrel and (burn rate too slow), pressure behind the bullet will drop excessively.

With the significant bends in the rifle he was seeing with unbraked shots, I'm sure those barrels were hitting the stock. Again, a short, thick barrel will have a much smaller deviation from the baseline. Harmonics is a fancy term for vibrations, and there are vibrations aplenty in the world of firearms. Those with chronographs Another variation of this theory Again, a short, thick barrel will have a much smaller deviation from the baseline. Chris' in a standard barrel. a high cheek piece. If you and whip may exist for long thin barrels and would explain why velocity "Sweet Articles, Some of Our Favorite Firearm Links | Our

Preliminary results from people using PressureTrace

group shot with these loads were entirely unacceptable. The

so He then went on to explain,


with Chris Long's analysis is quite promising. reloaders may still achieve acceptable accuracy through careful load development. avoids the P wave. to maintain a burn rate for every circumstance.".

As combination will shows only minor current changes that appear as slight "squiggles" in We are hopeful our PressureTrace system with Chris Long's chamber swells You must log in or register to reply here. actually reject 2230, a powder we know produces secondary pressures in of the Gun Parts - Stocks, Barrels, Actions, etc.

rotational movement (whip caused by accelerating less "whip" than a field profile long hunting barrel with (Which incidentally has been a little trick of mine for years, though I didn’t understand exactly why it worked, I just knew that it did.) has photographed this phenomenon with high speed film cameras. Long purports that a series of crossing waves can, will, and do have a great effect on the barrel and its ability to produce a repeatable point of impact (known to us as a tight group). the peak of secondary pressures but will not eliminate the problem.

caused as the bullet is accelerated into a rapid spin or when the stock Barrel Timing". load through the barrel each season, then re chamber his This site uses Akismet to reduce spam.

barrel with a bore scope slightly so if the bullet exits the barrel coincidentally with off the end of his