SPF -Hart Stainless chambered in 300Rum, barrel has around 200 rounds down it. Threaded for rem 700 action and threaded for brake. Prior to a 300rum, it was chambered for a 30 J and W wildcat that had around 200 rounds down it when it was 28", barrel was cut and rechambered to 300rum and is approx 25.5" now. I believe it is a 12 twist. Barrel taper is 1.25" shank straight to approx .84-.86 at muzzle. Very easy cleaning barrel shoots at or under 1/2 moa with 180TTsx and 95 grains retumbo and cci250 primers at 3300fps. Smith says slight throat erosion and slight crackling but shootable and it shoots very well but wanted to build a 338RUM so oredered a 30" rock creek. $100 shipped. Cheap way to a 300rum that still shoots well or cut and rechamber to another .30 cal should finish at 24". Would make a great 308 barrel.