A 10gr variation on a case the size of a 30-06 isn't that odd from my experience. I've tried my hand at weight sorting Win, RP, FC, LC, and IVI brass and a 10gr variation isn't that extreme. The weight between brands can vary as much as 30-40gr in 308 cases, probably a touch more for 30-06.
I wouldn't worry about it for hunting ammo.
10gr of brass is around 0.0757 cm^3 in volume of brass. That's around 0.0046 cu-in. With an average volume of 4.4 cm^3 (from Wikipedia so take with a grain of salt) that's a difference of 1.7% in volume (if all that brass is effecting the volume which it might not be).
If you were shooting long range competition, that might cause issues in your group size. For regular hunting ammo I highly doubt you'll even notice.
I recently setup a batch of 308 ammo for a rifle I use for psudo-benchrest shooting. The Win cases ranged from 151-164gr if memory serves. Most of the cases were 155-160gr and I managed to get a set of 100 cases from within 157-160gr. This was all after trimming, primer pocket uniforming, and neck turning. If I was loading for a normal hunting rifle or for plinking I wouldn't have even bothered with the sorting; I only do it for semi-match ammo to get rid of the extreme outlyers. The best way is to measure actual case capacity with water or alcohol but that's too much bother for my amateur level shooting.
