Gyro wrote:And Graham why on earth are you still playing with that 280 when everybody knows that loooong powder column aint gonna work. Dont they ?
Yep terrible, that is , doesn’t work at all !
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Gyro wrote:And Graham why on earth are you still playing with that 280 when everybody knows that loooong powder column aint gonna work. Dont they ?
Gyro wrote:And Graham why on earth are you still playing with that 280 when everybody knows that loooong powder column aint gonna work. Dont they ?
Tim N wrote:Gyro wrote:And Graham why on earth are you still playing with that 280 when everybody knows that loooong powder column aint gonna work. Dont they ?
I'm glad no one mentioned the above to my first 280 AI - it was very accurate at long distance and wasn't a pain to tune.
Possibly just a hummer barrel?
wsftr wrote:sungazer wrote:Has anyone ever taken a barrel to a musician or a music store where they have tuning equipment. If a barrel is struck with a metal striker (think like triangle) it will resonate at a certain frequency. I have no idea how this may fit into the equation of barrel tuning but thinking about it i think it would be a parameter than needs to be known if you are going to be using barrel tuners as they will change this frequency and the really only empirical test that can be done is this as you can directly measure and quantify the result.
Wouldn't you just look at the frequency change on paper?
sungazer wrote:wsftr wrote:sungazer wrote:Has anyone ever taken a barrel to a musician or a music store where they have tuning equipment. If a barrel is struck with a metal striker (think like triangle) it will resonate at a certain frequency. I have no idea how this may fit into the equation of barrel tuning but thinking about it i think it would be a parameter than needs to be known if you are going to be using barrel tuners as they will change this frequency and the really only empirical test that can be done is this as you can directly measure and quantify the result.
Wouldn't you just look at the frequency change on paper?
The inherent natural resonant frequency would not be able to be shown on paper. After being struck it would resonate at a frequency for a period of time greater than when the bullet leaves the barrel. The frequency may or may not change I suspect not just the amplitude vs time. Probably the best tool available to the home tech available for use with firearms would be the barrel pressure indicators.(Strain gauges). The other auditory method like I mentioned that are used in the music industry perhaps a microphone with a spectrum analyzer would be another way.
sungazer wrote:If I was doing the tests I would do them for all the states you mentioned
" Personally I question the validity of needing to know the inherent frequency of a barrel that isn't in an action, that isn't in a stock that isn't being gripped tightly or not..."
I would also do so very high speed photography, use strain gauges, as many different approaches as possible to get numbers that can be analyised. I would be doing the same tests with tuners on, off on and set differently.
As other have said until you know what you are trying to fix and then how and why ect.
in a lot of the articles I have read the tests carried out and the conclusion are not really very tightly connected. I would say there is a bit of a jump to the conclusion rather than hard fact that can be reproduced and varied all while concentrating on the movement of the muzzle Vs time.
sungazer wrote:I am probably on the same page as you Gyro. Coming from an electronic background and test and measurement equipment I have seen and used devices to both tune electrical Harmonics and remove them with quite a few different techniques. A lot of what I have seen published to date has not used what I would consider good test and measurement equipment.
For me I need to see measurements, not projectile on paper results as they are influenced by too many other factors. Also with all these measurements a complete analysis and calculation of all the measurement errors and an uncertainty calculation to go with it.
Audax wrote::roll: Bullet sectioned.jpgYa reckon a barrel tuner would fix this......a good quality expensive unit.....we will never know if it was a flyer.....
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