It is a 11.25 twist .30 caliber (308 win), reamed to SAAMI specs, of course 5R rifling, finished at 26 inches with a recessed crown. I had the barrel melonited. This was my first custom barrel and I can certainly tell the difference between factory and custom in the cleaning aspect. The custom (Rock Creek) barrel takes at least half the time and effort as any factory barrel to clean. i dont experience the dreaded copper fouling build-up, due to the fact that most custom barrels are handlapped, which makes all the difference in the world. I have also used Shilen barrels in the past and have had really good luck with them, one in 300wm and the other in 204 ruger.

texwelder