Tuning......a little help

[buckhorn70]

I am in the process of tuning my Hatfield TD 55lbs at my 27.5" draw with some new Carbon Express Heritage 250 arrows. I have followed tuning instructions from Adcocks web-page. I have the BH @ 7 3/4"....nock point @ 1/2" high and the arrows are cut to 30" BOP and weigh 585g(100g brass insert witha 125g head). I think I have the nock point very close to where is needs to be. I am not sure about the spine though and here is why......My bare arrows seem to fly better than my fletched arrows. My fletched arrows fly well about a third of the time(I can see them kick to the left as they leave the bow and the bare arrows seem to fly like bullets), so I do not know if my problem is contact, spine or shooting form. As far as my shooting abilities I am pie plate at 25 yards and softball size at 17 yards and baseball size at 10 yards. With all that said....What do you think is going on ?

[Diamond Paul]

Do the bare shafts and fletched shafts group together in the spot, with the bare shafts on the right edge/bottom edge of the group (slightly weak and nock high)?  If not, then you still have some tuning work to do.

[buckhorn70]

ttt

[BobW]

Read the recent "OL Tuning Question" thread here...

BobW

[overbo]

If you're getting good flight w/ your bareshaft at 25yrds,then look into fletching contact or slideplate and shelf material wear.A little bit of lift from either one can cause havoc.

[Aggie1993]

Play with nock orientation and nock height.  I bet you are just a little off on one of those.  Sounds like you are getting contact and raising the nock height or changing the position of the nock could solve the problem.  Good luck.

[buckhorn70]

When do you know that you are tuned?...then perfectly tuned?

[R H Clark]

Based on reading your first post,when your bareshafts and fletched shafts are grouping together at 15 yards you will be good to go.

[Aggie1993]

I suppose that is subjective but my bow is either tuned or not........for me.  I really work to get my broadheads flying as perfectly and consistently as possible.  I shoot into my target (fletched arrows) at about 10' and check the impact, if they are straight (indicating good flight - spine) then I back up to about 20' and that usually tells me all I need to know.  Also, the target should be elevated so that it is about the same height as your shoulders and shoot without canting the bow.  If I notice a problem then I work at it until it is fixed (tip weight, brace height, trim silincers, adjust nock height, strike plate thickness, etc.) Also, if you shoot outdoors, wind WILL cause a fletched arrow to "kick" and a bare shaft may not.  Works for me. Hope that helps.