What's close? Are you worried you're going to see a difference on the target with +/- 4gr tolerance? It's most likely less than 1% of your overall arrow weight. Unless they claimed a tighter tolerance than +/- 4 gr I wouldn't get too worked up about it.
I agree, and I think the shafts are +/-3gr so you could easily batch them together (which my OCD forces me to do anyways) to make everything equal out
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