3 Rivers does not weight match their arrows. I had a dozen from a few years ago, and there was 70+ grains difference from the lightest to the heaviest in that one dozen. These were their pre-made "hunter" arrows.
Buy good quality shafts from a reputable vendor that hand matches for weight and spine. Get a grain scale and a spine tester as well and make your own. That way you are in control of the process from start to finish. A good matched set of wood arrows is hard to beat, but a lot of the bad press given wood arrows in the last 5 -10 years comes from the lack of quality shafts and arrows that are out there and available. Going with machine matched spine only, and no matching based on weight, will not result in a quality shaft.