yeoman
Does thetarget you posted shows similar (or lower) velocity for the 300's than the 250's. I'm probably missing something here?? I can understand the theory just not the results on this target.
The target does show a difference in velocities between 300 grain bullets and 250 grain... The test sabot mentioned is the MMP HPH-3p
The 250's average about 1864 ft./ Sec
The 300's average about1797 ft./Sec
Which I think is about right, in computing ballistics I use 1860 fps for 250's and 1750 for 300's
What would cause a bullet to perform at 100 yds. and not at 200 other than shooter or the elements if all aspects of loading are the same?
Length of the bullet/rotation of the bullet/velocity of the bullet.... I am think of a top... as long as it spins @ a given speed it rotates great, as the speed (velocity) deteriorates the top begins to wobble - so you can imagine that effect on a bullet. A 1/28 twist in an inline is ok for a lot of bullets, but maybe for a 10mm at extended ranges it is not????
One wouldn't expect a combination which produces 2" groups at 100 to produce anything better than 4" at 200, and probably worse, but that isn't the gun or load's fault, IMO.
In the normal curcumstances.... I would totally agree and that is exactly what I expected, but it did not happen. I beleive I was able to stabilize the bullet out to a 100 yards even though I was loosing some unknow pressure as the the combination goes up the barrel... I still have the velocity and the speed of rotation to hold it true through and to 100 yards. But as the bullet slows and the rotation slows - I think I am starting to get some instability in the flight path. I do not believe these same results will be found when I shoot the 200 from the Remingtons or the Omega, might from the GM barrel though because I am not shooting it with the same velocity as I do from an inline...
Just my thoughts - certainly not suggesting that I know the facts...
Example... I was convinced that a 1/48 twist traditional barrel could not shoot the long 460's conicals but it does, a lot of people will tell you can not shoot sabots from a 1/48 very well or if you do you need to shoot lighter bullets - well, for me I can shoot them quite well but I need to shoot 300 grain bullets.
Hope some of this makes some sense to you.... and others for that matter
mike