Re: Xx75 magnum
They will work just fine, aluminum has been killing deer longer than carbon has. My xbow came with XX75's and they were accurate for me too. I do use carbon now for the durability I will admit. Just like HOOVE said, simply make sure your XX75's have remained straight after hitting something tough, especially after pass through shots that slam into the ground.
"I became insane, with long intervals of horrible sanity"
-Edgar Allan Poe