Neck wall thickness

What's the thickest neck wall that you use?

Just bought a couple boxes of Nosler 243 brass. It's trimmed, chamfered and weight sorted. One box, they weigh 170 grains +/-0.6, the other is 168.5 +/-.5. The only issue is that the neck wall thickness checks .015 to .0155, which seems a little thick. Didn't see much variance around each case. The neck on my barrel checks around .278 or .279, so the loaded rounds should fit with about .004 clearance. Should I bother turning necks?

Thanks in advance,
Dana