arrow porpoise

[kennyb]

hey guys i need some advice...been shootin' good most the summer and my arrows appear to be kicking up just before it hits the target. now, my shots are still accurate and brace height is about 8.5 in. and i double checked the nock too! any words of wisdom would help! thanks guys!
Kennyb

BW-PSA III  47# @ 28.5

[Wapiti Bowman]

Kennyb,

Generally speaking, porpoising involves the nock point. A nock high can mean a nock point a bit on the high side. If you haven't tried lowering the nock point slightly, you might start there.  If that doesn't work, we'll have to look to something else??

[jhansen]

Are the arrows kicking up just before reaching the target at all ranges?  If it is happening at 5, 10, 15, and 20 yards consistently then there's something else happening other than poor arrow flight.  Since porpoising is an up-and-down movement in flight the arrow should strike nock level at some rangees.

[ntxautoxr]

After checking everything else, take a close look at how each limb bends at full draw.  Have someone watch you shoot a couple of arrows.  One limb may be significantly weaker than the other and they may spot it immediately if looking for it.   This will definitely cause the arrow to fly like a bucking bronco.  This happened to me with a new bow.  The maker promptly replaced it with no arguments.

[Davt]

move your nock point, but have someone look at your arrow flight as well.

[Larry m]

Kenny
What is your nock point set at? If your arrow enters the target nock left or right it is most often spine of the shaft. Porpoise usually is an indication of incorrect nock point location. I normally start out 5/8 above center and work from there. Most of my bows are set at this.

[Wishbone]

Another vote for nock point problem. You should see that soon after the arrrow leaves the bow though. What range are we talking about here?
Hope you get it fixed.
Good luck.

[kennyb]

hey guys....thanks for all the help! my nock point is about 3/8" above center. every now and then it appears just before hitting the target the arrow porpoises just a little. I have experiemented with moving the nock point up and down and think I have solved the problem! Your guys advice has been invaluable. thank you.
Kennyb

[kennyb]

Gentlemen-
I made some additional adjustments to the brace height and also the nock and it made a huge difference! It's amazing how 3/8" or 1/4" makes such a difference in arrow flight and the noise of the bow. You guys were a big help, so thank you so much and I will not wait so long to ask for help! lol
Kennyb

[BenBow]

I also find if my drawing arm elbow is too high it puts extra finger pressure on the nock and causes my arrow to porpoise. I really notice it when I get tired. Spent a lot of time messing with my nock height causing it to be quite high until I noticed the elbow problem. Nocking point is back in a more normal height.

[kennyb]

that's a good point, Ben. thanks and I'll check that out 2morrow morning when I practice!