I posted this in the bolt action section but haven't got many hits. I am about to start chambering my new build and had a question regarding neck clearance. The reamer I have is a JGS 338 RUM Saami With a neck that measures .372. Loaded rounds are measuring .365 in the neck area. Also the body is measuring about .006 clearance for full length sized brass. I feel like I might need a tighter chamber than this. What are you thoughts? Any comments are appreciated. Thanks.
Gunsmithing .338 neck clearance
- Thread starter Texar2
- Start date
That's the exact same dimensions my Lapua runs and it works great. Shoots .2-.3 MOA. You need clearance for it to work. Much tighter and pressures can redline in a hurry. Is this a hunting rifle or a dedicated match rifle?
Thanks for the info. It will be a multi purpose rifle. The more I think about it the more comfortable I am with the dimensions. I do not want to have to neck turn my cases. Also I am not used to building large magnums and I am beginning to think that the extra room is necessary for proper expansion and contraction. Thank you for the info.
