I'm trying to tune some arrows the nock is high and left, is it just weak spine, I dropped 25 grains of point weight and it seemed to be worse

Right hand shooter? If so, nock left is usually an indicator of weak spine. Are you using a second nock point? If not, tie one on to make sure your arrow isn't sliding down the string. Could you list your bow and arrow specs?

I would say with info given yes. If release is good nock point good I would think it's just weak. If you have a doubt change weight by 50 to 75gr up front should see changes then.... shoot straight

nock high indicates your nocking point is too high nock left indicates week spine How ever nock position is not very reliable. The target material and condition can influence the position as well as a couple of other things. What you need to do is shoot matching bare shafts and fletched shafts. The relationship between the two is a much better indication of what you need to do. If they group together at 20 yards you are gold. Gradually work back to 20. Good luck and any questions give me a shout.>>-->Ken

Could be bouncing off of rest.

Zagnee your information as given would, on the face of it, seem to indicate a weak shaft. However there are 2 other considerations.

One is how does point of impact between bare and fletched shafts compare? You would do better to be running a tuning procedure such as seen here:

http://www.acsbows.com/bowtuning.html (click on download printable version)

That procedure relies on the comparison between bare and fletched rather than just bare shaft alone. Works a lot better.

The second consideration is that when a shaft has VERY stiff dynamic spine behavior, the nock end of the shaft will strike the riser. This drives the nock end left. The result is a "false weak" indication You can usually tell this by rather obnoxious "whack" sound upon release. That and/or if dropping point weight in order to correct for a suspected weak condition only makes it worse.

Kinda sounds like you are actually running too stiff given what you have said.

What 2 bears and Bender said. Nock orientation is the most mis leading, least reliable indicator available for tuning.

Impact is what matters.

I'm with the space robot (Bender) on this one.

While I do look for the best flight & impact I can get from my bare shafts, I know it takes a steady hand and really good release to get it. That isn't always the case, so my bare shaft grouping in relation to my fletched shaft grouping is always the more important consideration.

Rick

Hey we pretty much all agreed. It is the comparison of bare and fletched shafts that have the final say. Good chart Jim.>>-->Ken

Thanks, I will Fletcher some this morning and see

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