Love this discussion about reading the target and pos comp. it really is a topic of discussion and implementation which will make long-range and ELR achieve greater distances, precision, and accuracy. Several LR world-class shooters are playing with changing stock angles in relation to the barrel angle. Really looking forward to hearing how that testing pans out.
Yes they do, and people ignore that fact that limbsaver deresonator is no worse than any of thes fancy tunes, it's small weight that you move (and it also works as a dampener). And there are great videos like the "2$ barrel tuner" where people put shaft collars on the end of the barrel and they work just as a 300$ barrel tuners...
Your local hardware has $2 solid rubber door stops, that work just as well. Drill out the door stop center mount hole to a diameter just under to thickness of your barrel, use some light lubricant to slide the stop onto you barrel and start shooting. Make micro adjustments of the rubber along the barrel till the shots start touching and you have found a sweet spot. Then measure the distance from the end of your barrel to the stop and that's your future reference point.
guys what about running the receiver and the bolt to the barrels, basically machining everything which you casing is squared up, facing the bolt action to the receiver and the barrel everything is squared up by machining the ends so its perfectly squared and also then making sure the projectile is moved to the optimum point inside the barrels start point and just before the twist of rifling starts, and of course making sure that the barrel is seated properly as well, these things cost a lot of money compared to buying a brand new Rifle centerfire 308 and expect it to shoot perfectly dead on at various distances, now the people in New Zealand and other barrel makers and gunsmiths do all this when you rifle is asked to go beyond the point of a standard range point of a factory ammo of a 7.62mm X 51 ammo? Also the same goes with other size ammo, from 223 to right up to 360, so even a .338 factory rilfe would need to be machined up everything must be squared up so that when the bullet is fired and depending on the twist of your barrel it will go a lot more perfectly, now customised barrels cost a lot of money, but even if you brought any model 308 weapon system if you got these things done will be at least 50% ahead of the other's due to the fact they dont know about doing this by a very good gunsmith who makes custom F/ class and target center rim fire type rifles, now as far as those customized off the shelf rifles like your ruger PRS are good but with a little machining they can be made even better its as simple as that like buying a new car, the factory makes them to comply with government regulations, but spend a little more on tunning and you can expect at least 30 to 50 % more performance, but again its up to the customer to make sure he is buying a weapons system based on the use of that weapons system , shooting for feral animals and not going past say 400 yards or shooting the same weapons system to go way beyond the factory specs of around 800 yards max for a 7.62mm X 51 rounds. cheers and keep up the great work. :)
A littlel custom tuning never hurts! You have much more time on your hands than does the factory trying to pump out thousands of firearms every single day in a mass-production environment. With that time and attention to detail, you can make something even more accurate than it comes from the factory.... Unfortunately, you really need to know your stuff to do it, though, because you can also make your gun a lot less accurate than it was from the factory, too ;)
Your guess is in line with my experimental results. This resonance exists on the left and right, up and down, and is a complicated trajectory. But it is a recordable track.
This was my question as I listened to the explanation about "vertical displacement". Why only vertical? The barrel harmonics must involve the displacement of the muzzle in roughly a "cone" of possibilities. That said, I'm also going to assume that for any given barrel, given the unique physical characteristics of that barrel (metallurgy, stiffness, distribution of mass etc., etc.) that the direction of displacement should be reasonably consistent. That is, it is along one line direction, more or less, every time. It shouldn't be vertical one shot, horizontal the next, somewhere in between the next and so on. So by using some kind of a barrel "deresonator", you should be able to have the muzzle pointing in the same direction, when the bullet exited the muzzle, more or less each time. By the way, this was understood way back when. The Lee-Enfield No. 1 Mk III, over one hundred years old, had a variable bedding screw located underneath, towards the end of the stock, back of the nose-cap. It was simply a spring loaded screw. By varying the pressure exerted upwards on the barrel, you were effecting the barrel harmonics and could, to a degree, "tune" the barrel for the best accuracy. This was done at the factory and God help any soldier caught fiddling with it. Unit armorers knew about this and would adjust the screw tension when rifles were repaired or refurbished.
If I had to guess, I would say it's because the rifle is mounted in the vertical plane, so the differences in force, and the recoil movement make that the vector that can be "tuned". Also, theoretically a barrel can be "perfectly" straight right to left, but gravity does "pull" a tiny tiny bend in your barrel that I would guess gets kinda straightened out and causes vertical movement when a round is fired.
