More poundage means less forgiving for most people, and less accurate.Perfect tune is critical. And perfect form.I have blown thru shoulders with 66lbs and 270fps with 420gr arrows.

Flatter trajectories doesn't mean more accurate at all either.

I still shoot two bow that are from 66-68lbs. As long as I am between 60-70 and over 240fps, I don't really care. I use bow poundage to tune the bow to the arrow.