Hi.
What do you think is the best barrel-twist to stabilizing a 500grs. Hornady RN, or a 405grs.Rem. SP bullets using subsonic velocities in a .458x2" or .458 x1,5"??

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Shoot well, and hit hard.

Arild.
(And YES, I'm a NRA member!)

Twist stabilisation in air is independent of velocity. I recommend 1 in 12", but the conventional 1 in 14" will also work.

I thought you had to achieve a minimum RPM to stabilize a given bullet, which implies that a slower muzzle velocity requires a faster twist to stabilize a given bullet than would a faster MV.

I thought the Greenhill formula left out MV only as an approximation.

Don

I agree with you there, Don G.
I'll also go for a QUICKER twist.
But, I read something strange about the 458 Socom in the "Accurate Rifle". If I remember it right, it says that the 458 Socom chambered AR-15 had a rifle-twist on 1:18"????
And I've also seen 45-70 rifles with a slower twist than a .458" Win. for intance??
My belive was (earlier, though.), that a twist on approx. +/- 1:8 would be more appropriate??
Norbert;
Remember we are speaking of subsonic velocities here.

------------------
Shoot well, and hit hard.

Arild.
(And YES, I'm a NRA member!)

[This message has been edited by 460wby (edited 04-18-2002).]