Unpredictable arrow flight

[Kninja]

Yesterday when I was shooting broadheads, 160 gr. Zwickeys, I started noticing really bad flight out of every fourth are fifth shot. 3 shots in a row fly perfectly, the next turns sideways coming out of my bow!

I try to single out the arrow that's messing up and find that all my arrows are doing the same thing. Next I tie on a bottom nocking point, and it seems to exaggerate the bad flight. But its still only about every 3 or 4 shots.

What's really bothering me here is a couple of months ago when I got the new Zwickeys in, I went out and shot at 40 yards. I had my cousin stand directly behind me for over 30 shots and neither of us saw anything but great arrow flight.

I don't know what could have changed or what is causing this to happen only a % of the time. I've been shooting all summer long with no problems. I need help.

My setup:
62" Pearson recurve 45 @ 28
30" draw
32" Traditional Only 500 carbon arrows 5" feathers
50 gr brass inserts
160 Zwickey Eskalites
178 fps with field points

[moebow]

Kninja,  IF your arrows were flying OK earlier and IF it only happens every 3 or 4 shots, you  are having a form change (breakdown) every once in a while.  You'll have to video yourself enough to catch the changes associated with the fliers.

[Art B]

That happens to me when my tab gets worn down. Maybe try a new glove/tab........Art

[Charlie Lamb]

It may be an indication that you are putting top pressure on the arrow at full draw. (unless you shoot 3 under)
Try spreading your fingers so there is an eighth inch gap between fingers and arrow nock.
Touching thumb to little finger while drawing can help as well.

Broadheads will always be more sensitive to form issues than field points.

[Charlie Lamb]

And for the sake of everyone here, post the results of what finally fixes the problem.

[Javi]

sounds like a pluck or a dragging finger to me..

[Kninja]

I do shoot three under. I'll give a brand new glove a try Friday and get one of my friends to video my shooting.

[mark land]

How did you come to your arrow combination?  Sounds like it could be a slight arrow tune problem, if you are on the ends of arrow spine either slightly stiff or too weak, it can show up as well, broadheads will show any errors more.  A perfectly tuned arrow is much more forgiving of minor shooting form flaws.

[Friend]

I firmly believe the advice thus provided based on the relayed information to be quite excellent.

Also appears to me that the arrow is too far underspinded. May consider grabbing an ICS 340 from a local archery shop and giving her a go.

If possible, also grab a 400 ICS for trial.

[Terry Green]

One thing you didn't mention was...

Have you shot them with field points and the same thing happen?

[Kninja]

The same thing did happen with the field points but only 3 times out of over 300 shots.

As far as my arrow setup, I originally bought the same arrow in a 400 and they were too stiff, knock right every shot. So I went with the 500s.

I've got a pretty light setup now. I'd hate to take any weight away, but that could be the case.

[Art B]

I have to agree with Friend that your arrows appear to be underspined. A couple months ago it was really hot which probably lowered the bow's spine requirement. Things have cooled down some which probably added a little more zip to your bow. Good form every time will let you skate the edge of being on the verge of over/under spined. I like to be closer to the overspined side myself.

Perhaps check your speed with field points again as Terry suggested to see if temperature changes has effected the arrow's speed.

[Red4arm]

Sounds more like release issue.
Let someone else shoot it and see how they fly.
My experience with poor tuning I would think the erratic flight would be more consistent. Form and release are what changes while shooting.

[CEO]

Have you changed your string recently? Sometimes there are minor tuning issues with new strings.

[Hard Times]

What Red4arm said

Same thing happens to me, always poor release.

Rod

[Kninja]

I using the same string I used last season.

[PaddyMac]

I get that. Every once in a while I get a wild fish tail to the left. The arrow usually correct and I don't miss by too much, but something happens with my release that just doesn't feel right. I notice that my release feels different when the arrows fly great than when they fish tail. So yeah, release.

When I get a "wobble" a subtle spasm in my bow shoulder I usually miss wide to the right or way high, but I can often catch it before I release and correct.

[Jason Scott]

Buying and tuning a new setup is probably out of the question this close to season. If so, try turning your cock feather 180 degrees and then try turning the two blade broadhead 90 degrees. Or both. Then only shoot when you are rested. I'm thinking that cock feather in and a horizontal broadhead orientation may help along with a static release.

[Terry Green]

OK...if the same thing is happening with field points but less....its not the bheads...the bheads are magnifying another issue....

Borderline Spine....

Brace has slipped below tolerances for bow design/spine...

Nock point may have moved a tad....

Sorry if any of those have been mentioned...no time to read all the replies.

[Kninja]

Yeh Terry, after reading all these post I'm sure I've got a real
 problem that needs fixing.

I'm gonna leave no stone unturned this weekend when I get a chance to shoot. I'll repost and let you guys know what comes of it all.

Thanks for all the help.