Adding shaft weight without changing spine?

[kyhuntertoo]

Is it possible?

[kyhuntertoo]

i think my arrow spine is perfect, but would like to pick up about 30-50 grains to help hush the bow up.  not really wanting to put extra weight up front because i don't want to weaken the spine.

[Barry Green-Burns]

Kyhuntertoo,

Yes it is possible. You can order weight tubes from 3 Rivers or others. I saw someone joking about putting weedeater line in theri arrows, but I tried this and it works. When you put a full length weight tube in, it does not change the spine or the forward of center weight. Often times carbon arrows are too light and one has to add these tubes.

Green-Shanks

[Barry Green-Burns]

Kyhuntertoo,

Just remember to weight the full length of the arrow. If you don't you will change the balance and the spine. If you use weedeater string, glue it into the knock and cut it the length of the arrow. It will stay put. On all of my bows(Tomahawk, Howard Hill, Seguoia and Martin x-200, I find that they shoot best at 9-10 grains of aroow weight/lb of bow weight. On my 50" bows I shoot 450-475 gr. arrows and on my 55" bows I shoot 500-525 grain arrows. I use FF plus string and my slowest arrows are 190 FPS.

BGB

[tim roberts]

A second for weight tubes.  Weedeater line is ok, but the weight tubes fit tighter thus loosing the chance for creating an additional place for noise.

[sweet old bill]

I use the 1/8 poly rope that I got from a dollar store...seems to work very well...

[James Wrenn]

Anything you add to an arrow changes the dynamic spie some.Adding the weight full length of the shaft such as with weight tubes has the least effect.I would go with the tubes myself.Anything else you cram in a shafty like rope ect will start moving after the first shot.The last thing you want in an arrow is something that moves and is changing foc on every shot.jmo

[ishiwannabe]

Just make sure you secure the tubes, or have a lot of nocks on hand.  

[Mo. Huntin]

I am with James people keep saying it does not change it but I know it does I have seen it.  Makes it weaker for me everytime.

[zwickeyman]

Use the spine calculator to determine. You can add a crest wrap of 10 grains to the back. For every grain you add on the front you have to add on the back.

  You want an arrow that weighs 45 more grains, 25 grains on the front and 2 wraps on the back

[30coupe]

I tried the rope thing once, but it moved around in the shaft and gave me really squirrelly arrow flight. I mean, scary squirrelly. Once was enough for me. I'd rather have my arrows flying like darts and give up a little weight. JMHO.

[kyhuntertoo]

Originally posted by James Wrenn:
Anything you add to an arrow changes the dynamic spie some.Adding the weight full length of the shaft such as with weight tubes has the least effect.I would go with the tubes myself.Anything else you cram in a shafty like rope ect will start moving after the first shot.The last thing you want in an arrow is something that moves and is changing foc on every shot.jmo

that's what i'm afraid of.  I'm shooting 2016's.  the nock end is tapered so i'll have to heat the insert, yank it and load it from the front.  is that do-able?  are there weight tubes small enough to fit in that little bitty shaft?

[James Wrenn]

The tubes for 5/16th carbons will work.If they are too loose crimp them a few places by bending them so they are snug in the shaft.Make sure you cut them to length to fit tight all the way from nock taper to insert.

[Avid Archer]

30coupe and Mr. Wrenn are correct on using rope to add weight. I thought by adding poly rope and gaining 100 grains would help with bow noise and provide more thump on arrival. After reading this thread last night, I removed the rope from half my arrows and shot today, the results surprised me. The arrows without the rope actually penetrated better than the arrows with rope, and grouped much tighter than the weighted arrows, and an extra 1/4" in brace height took care of the noise. A heavy arrow aint worth squat, if you can't put it where it needs to go.  Just my 2 cents.

[Rob DiStefano]

anything you do to increase arrow weight will affect arrow spine/stiffness.  whether or not that added stiffness will affect arrow release and flight is a questionable matter that bears testing.