Originally Posted by KYpatriot
Bullets cannot "return" to a group once they have deviated from it. The phenomenon that people are claiming causes this is called epicyclic swerve, the common name for it is "going to sleep." It is a red herring, and even if it is present is to small an effect to be measured- lost in the noise as they say. Might as well say it was coriolis lol.
I don't doubt that people have shot groups at 300 yards smaller than 100 yards, but if this happens it is because of the shooter not a result of gyroscopic stability effects. It isn't uncommon for people to shoot better when they can't see the group as it develops.
The bottom line is, the laws of physics demand that dispersion in a group is proportional to the time of flight, and thus if you shoot a great group at 300 it would have printed even better at 200 or 100. Sometime I need to set up some clear cellophane to capture the group at 100 and 200 in front of a 300 yard target and prove this empirically.
Well there are a lot of people very experienced in the industry that disagree.
I don't know if the law dispersion would apply to a projectile such as a bullet that spins and cuts through the air, maybe a round projectile would be appropriate. I'm not saying you are wrong or right, I'm just saying there are bullet manufactures and people who do this for a living that have found some cartridge combinations have groups that will shrink slightly at medium range to long range.
Some theories surround the coriolis effect, some parallax another speaks to stabilization in general, comparing the swerving bullet to that of a car going to a straight road, hitting some ice and begin to get loose in the rear, letting the rear end slide back and forth, the car does this until it stabilizes, all the while continuing on the same path. Makes a little sense, but is it real? IDK...
There is enough talk and experience with this phenomenon for it to be real or at least something to consider, whether we understand it or not.