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POI change with lumenkocks

 
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  #1  
Old 07-15-2012, 11:23 AM
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POI change with lumenkocks

I've noticed that when I shoot a broad head along with a Lumenock my POI is low as if I was 5 yards farther back. Broad heads with my regular knocks shoot identical with the field tips. Field tips with lumenocks are hitting dead nuts. Only when I combine the two does my poi change. Is this just my isolated problem?
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  #2  
Old 07-20-2012, 04:28 PM
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Re: POI change with lumenkocks

NOPE Mine do the exact same thing I think they say lumenoks weigh aout 3-5grains more than a regular nock does, so it will change.
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  #3  
Old 07-27-2012, 08:36 PM
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Re: POI change with lumenkocks

I don't see any difference inside 45 yards when only the nocks change. Past 50, there seems to be a slight difference.

My broadheads cause way more POI change than my nocks do. I do notice it when I use them both though, but I attribute more of that to the broad heads.

G5 125 Striker Magnums have a pretty large wingspan though, so drag was to be expected. With a mechanical that are designed to fly like field points, I can see how you'd notice, although my groups probably aren't tight enough to make it all that obvious.

I usually practice for (shoot at) 2" at 20, 3" at 30, 4" at 40...on out to 80 (7 pins)
Farthest on a deer is 67m...farthest on a paper plate is 90m.
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  #4  
Old 10-12-2012, 05:36 PM
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Re: POI change with lumenkocks

I'm shooting carbon express blue streaks with their lighted nock and have 0 POI shift with field tips and g5 strykers. Is this only with Lumenock that ppl are seeing the shift?
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  #5  
Old 10-21-2012, 10:42 AM
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Re: POI change with lumenkocks

Quote:
Originally Posted by marinetowgunner View Post
I'm shooting carbon express blue streaks with their lighted nock and have 0 POI shift with field tips and g5 strykers. Is this only with Lumenock that ppl are seeing the shift?
I bought a set of lumenocks just to try them out and I am shooting low now as well. Must be because of the weight of the lumenock.
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  #6  
Old 11-12-2012, 12:01 AM
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Re: POI change with lumenkocks

The weight of the Lumenoks is not only add weight to the arrow (about 15 grains for "X" nocks like the Full Metal Jacket and Axis arrows use) but put it at the back end thereby reducing your Front of Center weight distribution.
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  #7  
Old 11-12-2012, 05:16 AM
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Re: POI change with lumenkocks

Quote:
but put it at the back end thereby reducing your Front of Center weight distribution.
That is it in a nutshell right there.

Even slight changes will effect the dynamic spine of your arrow as well, which can also throw it off a little bit. If your shooting light for poundage spined arrows it will show up more readily than if shooting a bit heavier spined one as well.

My friend and I spent a couple hundred dollars, and several months, trying out all of them in several different combinations of fletching, shafts, draw weights, and came to the conclusion that the Nockturnal effected things the least, stayed in better, and lasted longer than any of the others.

That said, I shoot several different bows with different arrows and haven't found the Nockturnals to change much if anything out to 50yds. Even with my lighter Carbon Express arrows shooting from my Drenalin at 70# they still will hit the ear plug with boring regularity if I do my part.

IF you can find some Nockturnal's or order a package, you might even contact them to see if they will send you one to test, I think you would be better off with them, and probably not see quite as much change if any with your set up.

When I say not much of a change, we shoot ear plugs which we stick into our targets, trust me when I say you see a change no matter how small,

two 3 shot groups, two bows same arrows @ 40yds,


I thought I had this showing the lighted nocks, but this was all I got. I don't do groups very often because I end up breaking arrows, that was why we went to shooting the ear plugs. That's also why there aren't any FMJ's in those groups too. It only takes hitting one, to ruin two of them, and that gets expensive fast.
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