Without seeing the shaft fly all I can say is it could be one or several problems.

Arrow nock too tight on string

Bad release

Improper tuning

Nocking point on string in wrong place

These are just a few things that come to mind.

However, if it’s not doing it all the time I would say improper tuning and bad release are most likely the top two.

Troy

I’ve noticed over the year that folks are often more conscientious of their shooting while tuning a bow, which is to say they pay special attention to shoot every shot the same as the last. That’s a good thing. But when they’re just shooting to shoot, the highs and lows of their form come into play. If you’re only seeing the wobble sometimes that’s either because your eyes don’t pick it up all the time (which again is totally normal) or something inconsistent in your shot is causing it from time to time (normal there too).

That’s why I like to build my hunting arrows to not only tune properly, but maintain their stability even if I get off the string a little rough or torque the bow a hair. Field points and Judos don’t steer arrows, so they will still impact with a high degree of consistency regardless of minor inconsistencies in flight quality. Broadheads are another matter entirely.

Here’s another thing to consider: is the bad flight associated with one of more particular arrows, or does it happen with all of them from time to time? A friend of mine bought a couple dozen high end carbon shafts a few years ago and couldn’t get them to tune consistently. He’s a heck of a good shot (4th at the IBO trad world and 5th at the regular IBO world last year). After a bit of head scratching we put them on my spine tester and the problem became clear: they weren’t even close to consistent.

I’ve shot Bemans since the days of the pultruded Hunter and Diva shafts (1992 if I recall correctly), their ICS shafts since 2001, and I’ve never had spine inconsistency issues with them. But it’s still something worth ruling out. You may want to try numbering your arrows and shooting them several times each just to be sure the shafts themselves aren’t a problem.

dwc,

I was having a bear of a time tuning my arrows until I did two things. I started to paper tune and I also started to video record my shooting. I couldn’t watch the arrow that closely so paper tuning helped me figure out what it was doing in the air. Once I got the spine correct I was getting a nock high indicator about an inch. When nock fit and string nock adjustments failed I got out the camera. I shoot split finger and my top finger was causing the issue. It was to deep into the string and when I adjusted it bingo. the knock high was gone. I am a novice but this is how I got to the base of my issues. Good luck and the last time I had cork screwing arrows the spine was off as I recall.

I second what J said. And I know this is flying in the face of current trends, but I still like 5 inch feathers. If you do pluck the string, or slap your arm, or whatever during an important shot, the feathers will at least get your arrow going straight again.

Nothing worse than hitting a deer with an arrow that is wobbling…