Re: "168gr" Hornady AMAX.... Not quite.
Two things are going on here. On the one hand, you have a bit large (but not terribly unusual) bell curve distribution of factory bullets. On the other, you are weighing them with a compact electronic scale that will add it's own (not inconsiderable) error to the mix.
When I weigh Berger Bullets (for instance), I typically see them fit in a 3/10th grain spread. Except for your one outlier (167.2), you have all of these in 8/10th of a grain spread. I typically stratify bullets when I weigh/load them, ie. if I was going to load your pictured selection of bullets, I would start at the lowest, and keep loading them in order of weight. This way, there may be 8/10ths of a grain difference between the lightest and the heaviest (something which in itself will have NO effect on 300 yard accuracy), but there will be 1/10th at most between any two(or 10!) sequential shots. With the stratifying technique, you don't 'throw out' any projectiles, so it will save you in the end.
The other half of this picture is the scale that you are using to sort the bullets. The less expensive scales will have considerable error (with this scale, you are probably looking at +/- 2/10th of a grain... easily). At some point, I would invest in a better scale. When you are paying more for the bullets, than the scale you are sorting with...
In any event, if you are using this same scale to measure powder charges, you will have a LOT more effect on point of impact, than this small variation in bullet weight.
Long story short, use the bullets, stratify them if you like, but the distribution you show will not be measurably hurting your accuracy at short range (out to 600).
Hope this helps,
Darrell