Sorry for the delay (in remembering and responding), with the info from Page 438 of the Speer #9 reloading manual.
It specifies the following Four (4) rifles, chambered for .308 Norma Magnum and their twist rate;
Musketeer and Schultz & Larsen = 1 in 10" Browning and Husqvarna = 1 in 12"
Sorry WB, I cant help you out with who the manufacturer of the Musketeer brand rifle is/was??? But rest assured, one of the rusted on NE forum participants will know!!! Well maybe???
Edited by Homer, Sorry, I just re read this thread and Long Island has already addressed and answered this!
Hope that helps
Doh! Homer
-------------------- "Beware the Lolly Pop of Mediocrity,
Lick it Once and You Will Suck Forever"