On Mon, 19 Mar 2018 05:26:43 -0400, Tom Gardner
wrote:

On 3/18/2018 12:05 PM, Ed Huntress wrote:
BTW, my Browning 1885 in .223 had a 1:14 twist. The Weatherby Vanguard
used that same twist. My Browning wouldn't stabilize any bullet I
tried in it over 52 grains, but with the 52-grain Remington factory
varmint load, it grouped better than 1 MOA. Not bad for a
falling-block rifle. And it killed a 55-pound Javelina dead in his
tracks.


What was Stoner's original twist for the 5.56 NATO? If I remember it
was barely stable by design.

The original barrels seem to have been 1:14" as in 1963 the twist rate
was officially changed from 1:14" to 1:12". In 1980, NATO chose a 178
mm (1-in-7") rifling twist rate for the 5.56×45mm NATO.

--
Cheers,

John B.