Neck turning on 300WSM

[Twin_Thing]

Im having a 300WSM built for benchrest and im wondering the tolerances for neck size. ex: if reamer cuts for .336 neck. what should i turn necks to?

 

[pmarauder]

.0125 neck thickness for a .336 chamber

.0125+.0125 = .025 + .308 = .333 loaded round giving you a .003 chamber clearance. Id start with a .331 bushing if your not using a magazine or a .330 bushing if you plan on having them in a magazine. that will give you a snug .003 of neck tension

 

[Twin_Thing]

Thanks for the great Info!!