Echoing generator above, I joined this forum this year because I wanted to get back into archery and try out crossbow hunting. I can tell you from my experience your best bet is to invest roughly $40 more in your arrows (per 6 pack) and call Jerry at south shore archery supply and get some custom made arrows, will take you 5 mins over the phone to order for your crossbow. I went from shooting 2.5" groups at 30 yards using crappy factory made arrows to shooting 1" groups at 40 yards, night and day difference.
You should also ask yourself why are you shooting? Is it for fun, trying to get the best accuracy possible or hunting? I only shoot to get ready for deer season and I literally have 12 arrows right now. 6 for target practice (not shooting groups) and 6 that I will use for actual hunting that shot the best.