After reading the threads on cartridge overall length I checked my Sendero SFII in 300 RUM. I came up with 3.861 to the lands!! I used the method shown in the Hornady LNL thread by loading a dummy round long and closing the bolt on it pushing the bullet back in the case. I have the Hornady gauge enroute in the mail. Will compare my results to it when it arrives. Anyhow. Anyone here with stock sendero's in 300 RUM have that long of a throat? No mine is not shot out, less then 50 rounds through it.