Did some bareshafting today and The Bareshafts were about 4 inches right of my fletched arrows at about 15yds. Is this something I should care about?  My arrow seem to be flying just fine.  I know this means I'm slighty underspined, right? The bow is homeade, and 71#'s @28"s, about an 1/8" off-center.  The arrows are cedar 70-75 spine with a 125 grain field tip, which calculates to about right with stu's calculator.  So, I plan to shoot these arrows until they are broken or lost. But my question is do you think this will affect my accuracy much, and although these shoot fine would I shoot better if I upped my spine another 5#'s next shaft order?
OVERTHINKING, but its fun to do
Josh

4" right for a rh shooter is weak. can you shorten the shaft a little? How do broadheads fly compared to fletched?

I can shorten it a bit. How much would you recommend? I haven't tried putting on broadheads yet.

you should be fine with those as they are the fletching will act as a stiffershaft . but the only things that matter is how do the fletched arrows fly with blades, never shoot a bh with no fletch.

You want them just a tad bit weak and shooting just a little right of your fletched arriow for a right hand shooter as fletching will stiffen them up slightly.  You should be fine. But if you want to try and get them perfect you can cut one 1/8 inch shorter and it will stiffen it just a bit and see if it gets you closer to your fletched arrow.