I have a new old stock barrel threaded for large ring 98 Mauser. I had always assumed it was left over from Parker Hale M82 or M85 rifle production. It is 27 1/2" long chambered for .308 and a fairly heavy contour.It has a shoulder 1 1/8" long x 1.220" dia., tapers for 3" to .921" with a straight taper from there to within 1 3/32" of the muzzle to .780 dia. There is a straight turned area at the muzzle that is .748" dia. x 1 3/32" long. It has a 4 groove bore, with the lands about half the width of the grooves. I believe it has the smoothest bore inside that I have seen. One thing that really puzzles me though, I checked the twist three times, with tight fitting patches on two different cleaning rods and I measured 1 turn in 14" all three times. I had read that Parker Hale barrels were 1 in 12" twist, So does anyone know what I have? What bullets would a barrel with this twist be designed for? Should I keep it .308?