I just shot my SZ380 in my 25yards range...but i have question..With my stryker arrows (395gr) i got bulseye..then i decide to try my Carbon express arrows (465gr), i got another buleseye 3 inches higher !! ..I m wondering why?? is the drop should be more with havier arrows?? and now i don't know what better arrows for my SZ380 !!