ArthurP - Thank you for responding - I don't even know what the weight of these arrows are. Right now "spine" is a term I have not quite figured out. I'm into shooting arrows, I thought a guy would just go and get some and shoot em, but now I am finding out there are a lot of things to consider. The Vapors are ACC (aluminum carbon ?).

Our next shoot is in June, outdoor range, I'm not sure of how many targets are out there. One shot only at each target. Our indoor setup is actually 20 lanes wide with two go rounds at different targets from each lane (huh?). I'm having a great time learning to judge distances, only shot one no score target, a buffalo at 45 yds don'tcha know[8D], I missed the whole thing, a life sized target!. Anyway my concern is whether my arrows are getting weak and I need to replace them or can I get by for now before hunting season.