Are there standard tolerances for the board width? I am getting ready to install approximately 200 sq ft 3/4" x 3" B. Cherry in a study. I started racking the boards and noticed a few spots where I had some gaps due to boards being slightly different widths. In one of these spots I measured one board to be 3.018" and the adjoining board 2.985" for a difference of .033". I measured a few other boards and they fall between these extremes so it seems I just happened to position a board on the low end next to one on the high end.

So will gaps like this even out when the boards are actually installed? Do I sort out the widest boards and put them in row by themselves? Or is this considered bad or out of spec material?

This situation is not unusual for certain manufacturers. Do you mind me asking which manuf. it is ?
IMO it's not right and I'm not sure if there is a tolerance. You shouldnt have to go through planks like a big puzzle, to elimate the size of "v-gaps". You can tighten them up to some degree, but mismilling will not disapear, especially on a prefinished product. It's up to you , but I couldn't live with v-gaps. I would return the material for a different batch. If it's who I think it is, they use a number of different mills to mill up their products, some of the mills are better than others.

The flooring is BR111 Indusparquet 3/4". Was that who you thought it was?

I sent BR111 an email as well asking them what their tolerances are. With issues such as this would I be better off dealing with the distributor or the manufacturer?

That is not who I thought. I have had good experiences with BR-111.

If you bought it from a retailer, I would go to them 1st. If not, go to the distributor.

If you like , you can call and talk to one of the installation experts at BR-111. I wouldnt wait for an email from a manufacturer.

You didn't tell us what the moisture content of the boards with concerns.

The wider boards may have more moisture than the skinnier boards. The flooring may not be completely acclimated, yet.

In 27 yrs of installing i have had only a couple of loads of flooring with that kind of range, it happened just a few months ago and i reordered and sent back , got another pallet from same manufacturing and it was the way it was supposed to be. I am not saying that in a pallet once in a while there may be a couple of narrower boards but to have the majority some wider ,some just right, some narrower just doesnt make for a pleasant laying experience. I would call the tech at the mill and ask him what the width specs on that particular plank is and you may get your answer..

Your a lucky man. I know you havent dealt with Bellawood & LL.