Bow, Nockturnal or something else.

[ShooterMike]

So I originally setup my V3 with Easton FMJ T-64's. Could not get a good tune after all kinds of experimentation with the arrows and their lengths. Predominantly low nock tears / High impacting broad heads. I set those aside and setup some Nexxus Infinity 350's. Low nock tears / high impacting BH's. adjusted the rest to it's extreme limit and reset the nocking point, and they were BH tuned. That said, the rest was maxed out in one direction, and the nocking point was higher than recommended for this bow. I decided to tinker with the rest, and that didn't help. I changed the rest out to a different brand/style, and that didn't help. Two arrow setups, two rests, and same issue. Oh, and cam timing ... checked, re-checked, and checked again.

Yesterday, I decided to set everything back to zero and I started tinkering with my arrow again. qSpine OT2Go and Archers Advantage both show "Optimal" spine for my arrow setup. Back at zero on the rest setup with an obnoxious low nock tear. wrenching on the rest with no solution. Changed arrow tip weight, no solution. changed arrow length, no solution. Shot a much weaker, lighter arrow, much improvement. After all the tinkering I was happy with that solution, until I realized it still couldn't be the answer, as it didn't make logical sense.

The one consistent thing with my bad paper tears and tuning issues has been the Nockturnals - I've changed everything else ... more than once. I've cut and retied the nocking points at least a dozen times in this endeavor. The Nockturnals seems to fit my serving no differently than any of my other non-lighted nocks, so I think we're good there.

With the rest maxed out as low as it will go, and my bare shaft cut at 26" I can get a clean bullet hole through the paper, a fletched shaft is still nock low.

I pulled out the Easton FMJ T-64, which was also nock low, but now it was hitting nock high left. The difference this time was it had a g-nock and not a Nockturnal. That didn't register with me yet though. I changed modules on the bow, and it was now pulling 66.7lbs instead of 60.8lbs. Rest the rest back to zero. No change in paper tears. Still not registering with me that this isn't a spine issue. Grabbed an fletched 26" Easton Hexx 400 weighing 335gr, and H-nock. clean tear through paper. I'm still confused and stuff isn't registering. I said screw it at this point, and went to bed. This morning, before leaving for work, I read a suggestion that it might be the Nockturnals, so I shot again, and the Nexxus 350 with Nockturnal was low, and the same shaft with a g-nock was very close to perfect.

Some of the things I've noticed with the Nockturnals I have. most fit loosely in the shafts, few fit snug and right. To activate the light, the string has to move forward of the nock grove to depress the switch. Are these the things that cause the nock low tear?

Has anyone else had similar issues with Nockturnals? Any resolution, short of not using them?

 

[ShooterMike]

Here’s some of the tears:
This first one is the rest all the way bottomed out at its limit.

These were nock low with nockturnals, but, but now high left with g-nocks

Rest near zero. HEXX with g-nock

With and without Nockturnal.

 

[Hunter260]

What is your draw length and weight? Last season I couldn't shoot the nocturnals at all because they wouldn’t tune. I swapped to a heavier spine arrow and they tuned up well.

That shouldn’t work because the nocturnals would stiffen the arrow and so I can’t explain it, but that was my experience

 

[ShooterMike]

What is your draw length and weight? Last season I couldn't shoot the nocturnals at all because they wouldn’t tune. I swapped to a heavier spine arrow and they tuned up well.

That shouldn’t work because the nocturnals would stiffen the arrow and so I can’t explain it, but that was my experience

draw length is 27" and the bow is set at 60.8lbs. I also swapped modules and tried it at 66.7lbs and it made zero difference in the tear.

edit - if you notice the tear in the pic above with the Easton FMJ T-64, when I had a Nockturnal in that before, it was a low tear. With a g-nock in it, it's high left. That's a super stiff arrow too.

 

[Hunter260]

draw length is 27" and the bow is set at 60.8lbs. I also swapped modules and tried it at 66.7lbs and it made zero difference in the tear.

edit - if you notice the tear in the pic above with the Easton FMJ T-64, when I had a Nockturnal in that before, it was a low tear. With a g-nock in it, it's high left. That's a super stiff arrow too.

I’d maybe have somebody check and make sure you aren’t getting some nock pinch at full draw

 

[TNbowhunter]

May also want to check cam timing, but I’m just spitballing here.

 

[ShooterMike]

May also want to check cam timing, but I’m just spitballing here.

Thanks. Triple checked and checked again. Did rent tear with different nocks though, it seems.

 

[SnakeEater]

Height may be timing? With my v3 I had to get the top hat kit to get mine to tune for right/left rear correction.

 

[ShooterMike]

Height may be timing? With my v3 I had to get the top hat kit to get mine to tune for right/left rear correction.

Yeah that’s been my thinking all along too, along with spine, until this morning when I shot the same bare shaft through paper, once with the Nockturnal and next without. Incredibly better without the Nockturnal.

My theory is, when the string is released it moves forward of the nock groove, deeper in to the nock base to depress the switch. I suspect that this causes a tightness that causes the nock to leave the string a nanosecond later, but enough to cause it to be nock low.

I could change the cam timing to correct this, but that would alter the back wall feel, more than I desire.

 

[SnakeEater]

You could also try shooting slightly longer arrows to decrease the dynamic spine, I bet 1/8 to 1/4 of an inch would make those nocturnals fly like darts. weird that’s happening though. In the future you could add about 3 no. 4 shot bbs from a shotgun shell and a dab of glue to the hole of standard nicks and they’ll where the same. I did this with mine just to tune and shoot the exact same weight practice and hunting arrows.

 

[Exhumis]

Late to the party. Have you shot that arrow setup through a different bow?

 

[ShooterMike]

Late to the party. Have you shot that arrow setup through a different bow?

I haven’t. I will try it and compare though.

 

[Exhumis]

I haven’t. I will try it and compare though.

I’m fortunate enough to have two bows. Picked up a new bow, about drove me to drinking could not get it to tune. Sling a couple through the old bow, stacking them. With the new bow ended up being my rest, don’t know why. It was a WB too so go figure, not much to go wrong there but threw on my drop away and tuned in about 3 shots. For S&Gs threw the WB back on and again all over the place. Drop away back on and driving tacks. Never did figure out why.

 

[ShooterMike]

I’m fortunate enough to have two bows. Picked up a new bow, about drove me to drinking could not get it to tune. Sling a couple through the old bow, stacking them. With the new bow ended up being my rest, don’t know why. It was a WB too so go figure, not much to go wrong there but threw on my drop away and tuned in about 3 shots. For S&Gs threw the WB back on and again all over the place. Drop away back on and driving tacks. Never did figure out why.

My other bow is set up nearly identical. I’ll try these arrows through it too. My V3 shoots my other bows arrows perfectly.

 

[Exhumis]

My V3 shoots my other bows arrows perfectly.

Are those arrows set up the same way as the arrows above? You also stated above weaker spine you’re seeing greater accuracy and improvement, but with same broadhead setup? Is that correct? If so that means you’re benefiting from greater foc and the arrow is balancing out and taking the weight off the backend. But that doesn’t explain why it’s only applying to the v3. If you shoot them in your other bow with the same wonky results then you’ve got your answer. Perhaps I missed it but did you throw the v3 on a draw board to check for timing and cam lean? I know you shimmed it. I’ve only ever own an HTR and never had to shim it.

 

[ShooterMike]

Did some testing this morning before leaving town. I can confirm that the Nockturnals are not the issue, nor is nock pinch.

Gross low nock tear with both Nexxus 350 and Nexxus 400 at varying shaft lengths, tip weights, and draw weights, with and without Nockturnals. No matter what I do, nock low tear.

With current rest setting, it’s a nock high tear with two other arrows that fly well with “normal” rest settings.

 

[manitoba450es]

I was reading just a couple days ago that some people were experiencing low Nock tears on the V3's and the remedy after trying everything else was backing off the bottom limb bolt 1/4 to 1/2 turn and it tuned everything to perfect bullet holes. I haven't tried or know anyone that tried this myself but doing a lot of research on the V3X and I came across this info.

Best of luck

Mike

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