Friends-

What would be the "standard" rate of twist for a .300 Weatherby, if there is such a thing? Is a slower rate of twist required to compensate for the extra pressure and/or velocity.

I think I have a .300 Weatherby with a 1 in 12 twist or, even, 1 in 13 the shoots sub .5 MOA.

All thoughts comments and/or suggestions would be appreciated.

Well, it depends on when it was made. If it is an older Weatherby Mark V made in Germany it most likely is 1 in 12. If it is a newer Japan or US, 1 in 10.

If it shoots .5 with the load you are using do you really care what twist it is or does it really matter.

P Dog-

Well, I would like to build another .300 Weatherby on a M-1917 action, so, I would like to duplicate the same conditions as much as possible.

quote:

Originally posted by Magnum Hunter1:
Well, it depends on when it was made. If it is an older Weatherby Mark V made in Germany it most likely is 1 in 12. If it is a newer Japan or US, 1 in 10.

+1
My brother's Mk V had a 1 in 12" barrel that would not shoot 180 grain bullets accurately and only so-so with 165's. He had it rebarrelled with a 1 in 10" and it puts five 180 Speer Grand Slams into 3/4" at 100 yards.

If I were getting another .308" groove rifle or replacement barrel I would have to have a 1/10" twist rate tube. You would have to use extremely light for caliber bullets not to work in a ten incher, but on the other hand if you went with 1/12" you could probably struggle with 180 grain bullets.

simply measure your twist rate. Why guess?