Hey guy's Mark611 here, I'd like to say hi to all of the members here! I live in IN, and have been shooting guns since I was about 4yrs old, long time ago it seems like almost 50 now whooooo! anyway I'm an avid airgunner and long range shooter with my 308's and 223's and I also reload. I hunt and fish and love the out doors! I've been lurking arond here for awhile readin post and info so I thought I'd make my first post! I do have allot of questions on some rifle chambers like how can I tell when its out of round for sure? I've been noticing my brass gos in at 2.5 thousands, fire them and some come out around 4+ thousands out of round on my contrisity gauge, I go and neck size them after firing them and their still 4+ thousands out of concentricity, and yes I've done a full prep on the cases turned them and all after a full length resizing on new cases trimmed you name it I've done it to them and I don't understand why their this far out of round? the only thing I can figure is the chamber is out of round, its a fairly new Savage 12FLV 223rem I bought new this yr anybody got any ideas? thanks guy's glad to be here!