bolts... can you get a bad batch?

[Panhandler80]

So I bought 6 GT Laser IIS a while back. With them I picked up 3 luminoks. I grabbed 3 arrows and started sighting in with new set up. I put same vane down every time to make sure luminok contacts don't rub rail. With those first 3 I had two that would go in same hole every time at twenty yards and the third would be way right.

Well, I grabbed one to replace it and ended up with 4 good arrows. Set the right flyer to the side and started carrying the three good luminoks and one flat aluminum nock with me. Believe it or not, while I think the luminok is 13 or 14 grains heavier, it actually shoots flater at 30 and even a little flatter at 20. Tells me that GTs with brass inerts and a 100 grain tip actually have too much FOC for an Axiom.

So, I had four arrows. Lost one of my good ones. I should have one "good" arrow left out of my 6 pack. I got it set up tonight and started making sure everything is dialed in for tomorrow. Two arrows go in same hole every time, and this arrow (the last of my 6), is centered, but low. It goes in the same hole, but it's not where the scope is pointing?

What gives?

That's 2 / 6 that are oddballs.

I'm wondering if it is GT Laser IIs, or if maybe it's the luminok not being seated perfectly squarely in the bolt??????????

I'm thinking it might be the luminok. Because I put the cock vane in the track every time, it woud make sense that thos flyers are consistent, but off, if A) the arrow is not cut square, or B) the luminok is not seating square every time.

I have not tried changing luminoks (except for once), nor have I shot all 6 with alluminum flat butts.

Thoughts?

PS - None of these distances are huge, but they are bigger than they should me. 1 to 1.5" at 20 yards is, IMHO, bigger than it should be. I know it's not my shooting, or cocking, because I have marked the arrows and the low one goes in the same low hole. A right one goes in same far right hole, etc.

Good news is that I have two that are dead nuts on with my scope, so I'm good for tomorrow.

Oh, and this pattern is with fieldpoints and practice BHs.

Thanks

[vixenmaster]

Well its hard to say that its a bad batch, as they all are .005 + or -. Also without a dail indicator to tell where the wobble/runout is, which way to put arrow into slot!

[wabi]

I'm not sure what the allowances for straightness are for carbons, but I have tried a couple different brands (GT & Firebolt) and never got as good of groups as I get with aluminum.

I will also add that the pre-cut 20" aluminum shafts sold for crossbows never seem to equal the full length shafts I cut down.
Could be they salvage seconds by shortening them to be within tolerance? (I figure if the specs call for +/- .003 and a 32" shaft is +/- .004, when cut to 20" it might make the +/- .003 standard, but if it's +/- .003 at 32" then when cut to 20" it might be +/- .002 in reality.)

[snapperdan]

I shoot gt2s brass inserts and 100gr tricks out of my equinox shoots good!! My wife shoots boltcutters and firebolts out of her axiom. and that thing will putem in the same hole!!! Man im not goin to fix whats not broken

[Normous]

I had 4 GTII out of 12 that would would impact 3.5" to the right out of the Vortex and Equinox. I built them to within one grain of each other, the other 8 would group within a half inch. Those 4 went into the cull pile because the spine must be off- very frustrating to say the least. I have 12 more raw shafts to build, after these I will purchase the Maxima Hunter carbon shafts.

[Panhandler80]

Thanks, enormous. Your ratio is exactly the and as mine.

I now have two hunting arrows that are dead nuts on. One that's a hair low with new broadhead, and one thats a bit high and right. I put a used Broadhead on it and put the aluminum nock back in it. This way I have a coyote, coon, arrow.... Two good deer arrows, and a 3rd backup arrow for a deer if I need it in a oinch.

Not sure if I'll do GTs again.