Emiliodeluna. What type of arrow flight do you get? Do they fishtail or spiral? Usually a little longer arrows like your using straighten out quicker than shorter arrows. I usually shoot my arrows without fletching to see how they fly. from about six yards. I want them to straighten out without any fletching. if they fly with the tail of arrow sideways to the right they are to stiff. that's for a right hand shooter. if they fly sideways with tail to the left they are to weak. If their weak you can shorten shaft a little at a time till you get good flight or use a lighter point. If they are to stiff you can add point weight, file sides of shaft to weaken it or use same spine but longer shaft. many things can effect arrow flight though. Release, short or long drawing, width of handle, even the type of string you use. Like any other thing in archery, the most important thing is consistency. you need consistent anchor or at least drawing to same weight every time with a smooth release. then you can tune your arrows to the bow as I described. good luck and happy hunting. I think good arrow flight is really important the way I hunt. I like a very close shot and want my arrow to straighten out very quickly for good penetration. I hope you try making your own bow. there's nothing like going to the woods with your bow, but I really think you will enjoy the challenge of this style of hunting even with one you didn't build. I started hunting with mine just to see if I could. I found out I can. Now I'm to the point I'd really like to take one with one of my fellow PA bowyers bows.
bjrogg