I agree with Rob also.More weight just harnesses a little more of your bow's energy and at the ranges we shoot,trajectory isn't a big factor.
After decades of shooting 9-10 GPP arrows,a few years ago I set up some 700 gr arrows for a moose hunt.It took 3-4 shots to get the feel of them.I liked them so much,all my setups now are 650 grs plus,mostly 12-13 GPP.
My lightest bow is 48# and I probably draw it to 50.The most recent set I made for it weigh 680 grs.,13.6 GPP.It handles them very well.Recently I built some arrows for another bow and they turned out to be 740 grs.Not meaning to go that heavy but that's how it worked out.When I shot them,I was surprised that they impacted with my 655's and 700 grain ones.Curious,I stepped back to 29 yds which is my "point on" distance,with 700 grs.I'm not a gap shooter but use it if I want to take a shot that far.I shot two arrows into the bull 1" apart.I don't usually shoot that tight but it did tell me what I wanted to know about trajectory.
Then one day I decided to see what the 740's would do out of the 48 # bow(14.8 GPP)and found I was hitting dead on with them.I only shot out to 20 yds.I thought that bow couldn't be any quieter but it was with those arrows.
I know for some these are extreme examples but am just throwing them out as food for thought.I never thought I could tolerate arrow weights like these but at my hunting ranges there was very little adjustment and the gains in penetration and quiet have been considerable.