If your arrows are a little over spined...
example... shooting Beman ICS 340's when the chart says to use 400's, would changing the tip weight help out any?

I realize testing it out is the best way to find out for sure, but in general, if I were to switch to a lighter grain head, would that move me in the right direction, or backwards? Currently I'm using 125 grain heads, and was curious if 100 grains would be more sufficient. I'm grouping better than ever right now, but thought I'd ask.

Thanks