Damn you Fu¢kers, you CPR'ed this thread from the Grave !
Ok first off ... 308 BCG , bolt enlarged to WSM size. Extractor modified . One very important fact ... The cartridge must be shortened to fit a 308 mags, factory ammo will not fit mags. The 270WSM has a substantial recoil. Also follower for the mags must be modified.
That's it.... Mine resides in a safe. Fixed the ejection timing issues and the hard recoiling by adjusting the gases. But it's a duct tape over a maxipad kind of gun .