RC,
PM me if you are interested in my findings past 30 yards. It was done with a compound so I don't think that I should post it here. I used the compound because I cant group a trad bow well enough past 30 to know if the arrow's shooting high or low or if it's just me.
With a trad bow, 30 yards and under, I have found no difference in impact point between two well tuned arrows of the same total weight. I've gone with tip weights from 100 gr all the way to 300 gr upfront. I've even bareshafted with the same results (if anything would dive I would think the bareshaft would). Keep in mind that these are my informal results.
After trying all of this, I've found that a 200gr tip plus my standard insert and sleeve(227gr upfront) performs the best for my set up.