I shoot 28" Goldtip XT 5575 and have been shooting them for about 4 years now tipped with a Thunderhead 100. So far i' ve never had a problem with this set up as far as grouping or performance on deer. Before the carbons i use to shoot Easton Eclipse 2413 with the same head and with the same results, good grouping and death on deer. I can shoot either but have chose to stick with carbons because they are with out a doubt more durable imo. I like both so if i ever saw the need to go back to aluminum i would do so without hesitation and be just as confident with them as i am with carbon.