I was fixing to ask that exact question. the four that I ordered are 6.2 gpi at 26 inches. thats 161.2 grains. I am currently shooting 100 grain muzzys. I was thinking of going up to 125 grain head and dropping my draw weight. 125 head will put my arrow at 286.2 and give me more forward weight. divided by 5 pounds will put my draw weight at 57 pounds. Or I was wondering about an insert to bring it up 15 more grains. The only reason I have figured I would give them a shot is because I got the so cheap. My current arrow are carbor express terminators from wally world and they weigh 418 grains. Through my general at 60 pounds they were shooting 248. With a full length speed pro it shot 296.