I have seen all this to be true. You will be top performance at max weight, but for me, I like room to move. In other words, an arrow I like might be obsolete and I have to get a new set, and I have to adjust up or down poundage to get them to work. Like right now, one of my bows, has always been set to 65-66lbs. Well, I need a new set of arrows for it. I have fell in love with heavy arrows and have some 340's left that I shoot in another bow. I just so happen to be trying some 350 Cx out in that other bow. Good news, I have bumped up the poundage to 69lbs, and the 340's work great. I would pick a 60-70lb just for the future.