Usually I would just change the fletchings, I would just take it down to my local pro shop and he usuallly doesnt charge but when he does it is not much at all, maybe like a dollar. And as for your practice arrows, what you are doing is excactly what I did when I started but they were also my hunting arrows but I soon found out that those "Wal-Mart" type cheapys are very inconsistent in weight and one will shoot just a little different then another. So I am saying that they are good to practice with but I would buy a good set of arrows and practice with them before you go hunting and of course use them for hunting