[iiranger]

In the discussion of the rebated boat tail (over the regular boat tail) he cites a lengthy study, probably military, but government funded and probably done by the best science/equipment available at the time. As I recall:

Big consideration is the length per twist. The spin will stabilize, but if it is closer for the bullet length, less time/yaw/ etc.

Obviously the boat tail adds length without adding bearing surface. Good? Bad? It goes back to basic twist to start. There was a time when the "up to date" shooter had a .308 with a 1 in 11 twist...

Mr. C argues that the boat tail is wasted on calibers .24 and below.

And it only "kicks in" at long distance, actually when the bullet has slowed to below the speed of sound... With a magnum that is probably a distance aa average shooter should not be shooting at game...

Dave takes questions... corbins.com... if you want the science... luck.