6.5-284 neck wall variations

J

JRB

Guest
I have just received my new barrel chambered in 6.5-284, for my Bat 'MB' 17 pound rifle.
I want to shoot 600-1000yd with it.
The chamber neck diameter is .300" according to my smith.
I have some new Lapua brass and have cut just enough off the necks to try to clean them a little, .0161 and will end up close to .003" clearance.
Out of the 100 odd cases, i have ended up with about 6 with still .001" neck wall variation and about 5 with about .0015" variation.
Of the 90 odd cases about half are less nearly true and half are about .0005 variation.
Should i cut another .0005 bringing the total clearance to .004" or run with what i have done so far?
Just wondering to what degree this will effect the accuracy? and what would be your recomendation?
Thanks
Jim
 
I don't think it would hurt you that much. One of the most accurate 1000 yard rifles I ever saw was a no turn 6 BR. Matt
 
Thank you for that, i think i will leave it were it is.
My friend has just fireformed some 'No Turn' cases in his 6BR and achieved great results, with groups at 600 yds under 2 inches.
I was going to 'clean up' his necks after he fired his cases, as he was busting to try out his new rig. Not sure anything will be gained by doing so.
Jim
 
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