Weight Tubes in Carbon Arrows

[michigan bill]

If I put weight tubes in my 28",55/75 Gold Tip Carbon Arrows will I also be increasing the spine of the arrows?  If so, anyone know by how much?
Thanks!

michigan bill

[Cherokee Scout]

The spine will increase only slightly. Anytime the arrow is heavier, it will shoot slower. A slower arrow will in effect cause it to shoot stiffer.

[BMejia]

I added 3gr/inch weight tubes to my Carbon Express 250's recently. I could not see any difference bare shaft shooting the weighted and un-weighted shafts. Though they added 87 grains to my arrows, out to 25 yds my groups are very consistent with the un-weighted shafts.

Hope this helps, I had the same question and decided to experiment to see what happened. I have decided to add weight tubes to all my shafts.

Brian

[WildmanSC]

I added the 3 gr/" tubes to my Carbon Express Terminator Lite arrows.  I got my arrows up to 10 gr/" and out to 20 yards haven't noticed any difference in the performance of the arrows.  They fly like darts.

Bill

[Lytic]

I know I was wondering if the weight tube being pressed up against the carbon wall would essentially act as thickening the arrow wall and thus increasing spine. My tubes fit snug but I see no change in the spine. I have heard of problems when they are glued in, I'm assuming full length. Then I bet it is affecting spine.

[Onions]

I added 3gr. tubes to my Beman ICS. I saw no change in spine. Arrows shoot great, gave me a extra 82gr and at 30 yards, very little difference b/w weighted and nonweighted shafts.
I do have the problem of blowing the nocks off, when I hit something hard (rock, far shoulder on a deer, hard stumps). The weight tube will actually come out the back of the shaft.  I now make sure to carry extra nocks with me.

[Pig Sticker]

I added weight tubes to carbon express Heritage 350 arrows and they flew terrible out of my Zipper. Tried to shoot them for 3 months with no luck. Putting HEAVY broadheads up front helped some...

Good luck

[michigan bill]

Thanks, everyone.
I appreciate your help.

Bill