as far as hunting arrows go for whittail deer, what's better to use. I know their is alot to do with KE and the head, but what seems to work best. I'm worried that with carbon it will be to light and not get penetration on a poor shot like one in the shoulder. what do you all think. i want to calculate KE but i can't because nobody in this town as a crono graph. and their is no local bow shops. what would you say the minimun arrow weight for deer should be.