I don't think you would have any problems getting 300fps with the Extreme VFT,I shoot mine at 67 pounds and 29" draw weight,paper that came with my bow states bow shot 317fps with a 29" draw,70 pounds of weight and a 350 grain arrow.If you are looking for speed,I wouldn't recomend the Liberty or the Justice,Bows coming in with new Freedom cam's are shooting slower then bows equiped with Infinity cam.But,I would also recomend shooting all of the bows in question before you buy one if you can.