Had a carbon arrow just go stupid

[razorsharptokill]

I was shooting my broadheads getting ready for McAlester. One just started cork screwing. Changed BH. Same thing. Only thing I can think of is I dropped it tip 1st onto an Osage log thinking it would stick so I could shoot the other arrow. It bounced and fell to the ground.

The weights and/or insert must be out of round now. Strange thing is, it spins fine. At 15 it will hit ok, at 30 the nock end will do about a 10" circle. Weird.

Just proves that you should test the flight of each arrow/bh combination to verify flight quality. Spinning the arrow for wobble is not fool proof.

If they are carbon arrows, it could be that you had one in a dozen that the spine was WAY off and that there is nothing "wrong" with the arrow. I have seen that numerous times. Every once in a while one gets put in the wrong pile at the arrow factory! This could be a real possibility, especially if it was brand new and you have not shot it before. If you have one, you may put that shaft on a spine tester just to see.

Bisch

[AWPForester]

Re-seat the nock.  If nothing seems out of line and reseating it doesn't fix the cork screwing, putting a new nock on it will fix the problem.  

Carbons will shoot perfectly fine for 1 day or 10 years and start cork screwing after taking a wierd hit or something.  It is always the nock.  Sometimes you can't tell by looking at it and reseating them doesn't fix it.  So do not be fooled it isn't the problem if nothing looks out of sorts.  Changing it will fix it.  God BLess

[Caleb Andes]

Bisch.. that must be my case as well. I got a dozen carbons and all shoot perfect except for one ugly duckling.. I cannot get it to shoot straight to save my life.. the spline reads the same from the manufacturer.. perhaps I will have to hang a weight from it to see what the true spline is! This is the first time I have encountered this although I usually number my arrows as to which shoots the best I have never seen anything like this.. ugly duckling

[Doc Nock]

A gent who made up and sold arrows on the tournament circuit, told me that he always spined, weighed and spun all the arrow shafts before making arrows.  He sold to both the trad and "other" circuit shooters, so he had to be sure.

His input was that there are few carbon makers out there where the entire dozen is the same spine... some worse than others.

I ended up with one of the 2nd worse in my stash as my mainstay...so I ended up bare shaft tuning each and every shaft...I've got shafts that are anywhere from 1/16" to a full 1/4" different in length to get them to shoot the same.

I also found that when I'd get them right bare, then fletch, then shoot field points = slightly weak in FLIGHT...hit ok, but flight showed tail weak.

Put on a broad head and it was like on a string. Figure the weight might have been moved forward since a same weight broad head is longer for the same grains over a compact field point.

YMMV.

[JoeArizona]

I have one that does the same thing.  They all shot the same when I first fletched them, but now this one has developed a slight looping spin.  In the spirit of full disclosure...it may be the one that hit the block wall.      
I checked it out carefully and everything seems fine.  
It may just be it's passive/aggressive way of paying me back for shooting it into the wall.

[razorsharptokill]

It had been shooting fine before I dropped it.

[Blackjack]

make sure you flex those wierd flying carbons,listen any cracking sounds,just in case.

[WESTBROOK]

Check the shaft around the nock and the nock itself. I had a hairline crack in a nock that turned an arrow into a maverick, glad I found it before it 'Sploded.

Eric

[gonefishing600]

As a last resort, before I tossed the shaft, I would strip the flecthings, and re-fletch.

[razorsharptokill]

That's what I thought it was at first, a loose feather.