I recently finished a batch of arrows and when I shot them the new arrows would bounce up and down then usually end up hitting the target consistently low.

I have other arrows that are the same spine, weight, length, type of wood, and point weight that shoot like darts. I use a 5 inch 3 fletch shield.

Anyone had a similar experience?

Thanks in advance

Hard to tell from what you say.

Were the "good" arrows some you made too?  Or were they commercially bought then you just built your first set yourself using the same specifications?

Are the second set the same diameter?  Did you pay attention to the annual rings in the shafts and place the nocks so the rings are perpendicular to the bow? Are the nocks on straight?  Are all the feathers the same wing?

Really need a lot more information.

Arne

Do you have a spine tester?  Not unheard of that the distributor grabbed a mis-marked bundle of shafts and you have the wrong spine or the weight was way off from what it was marked.  

I made up some 65-70# shafts and when I got all done found out they were very consistant 55-60#.  Paper wrapped around them said 65-70# in nice big letters.  

Spine issues are normally causing side-to-side problems.  If your shafts are longer yoru eye puts them lower.  And up/down porpoising is release or nock point problems.  Try nocking a couple above the nock-point to see if they shoot better.

Maybe spine, maybe your nock point moved, maybe your finger pressure on the string is a little different... and, are you sure you're using the same weight points?
Of these, finger pressure or nock point are the two I'd look at first.
All assuming the arrows are straight.

Could be any of a number of things like Moebow listed...........if you want to consistently make good arrows with wood it helps to have a spine tester and a grain scale. And you need to be aware of grain orientation.

The arrows are all made by me, they are surewood shafts and the grain is orientated properly and is the same on all the arrows. I have a spine tester and a scale and the arrows are within 15gr of eachother, and within 60-63 spine

All left wing feathers.

Just thought it was weird that these are flying strange.

You have just a spine tester, or do you have a Scheib???!?
Do what stumpkiller says; shoot a couple nocked high, and report back...

This guy makes fantastic arrows, so it's not a question of irregular arrows, here...

yea.....i got a Scheib.

I will try shooting some with different nocking points and see what happens

Sounds to me like possibly your nock point is low and your arrows are bouncing off the shelf.

If the above is true; why don't the other (dozens)arrows bounce off the shelf?

Not sure....maybe hasn't shot those others in awhile?  Just gave him something to check to see if it could be a contributing factor.  Shelf wear, brace height, etc?  Might not be the arrows.

good point Rob...take both sets out and shoot them and see if there is a difference.

It sounds like a nock issue.  Are they the same type outs nocks and do they fit on the string the same?  I have had it happen after replacing lost or busted nocks with ones that had a larger diameter.

I just shot at the range today, after spining and weighing arrows.

The arrows are almost identical in weight and spine but the new ones keep bouncing up and down. I would shoot the old arrows and they flew like darts and the new ones bounce without changing anything on the bow.

I tried nocking the new arrows above the nock and they still bounced. cant figure it out. the arrows look nice though...maybe I can still get some crumbs on them

Check fletching clearance

Check FOC

Check length

Are you grinding your nock tapers? If so, check those

Are the arrow nocks tight on the string?  Loose nocks will cause that to happen. If you have to, build up the serving with dental floss. You also might have to raise the string nock due to the thickness of shaft.