I just made a little video that shows how i make carbon arrows heavy. This method is cheap, reliable, proven (been doing it for 15 years with carbon and aluminum) and the best way to get the extra weight need. I thought i would share it.
http://www.youtube.com/watch?v=lHneI6IceUo&feature=youtu.be

LOVE IT !!!!

Just moving over to trad I was trying to think of a way to use the dozens and dozens of carbons I have laying around. I would buy a dozen, cut a couple to test with and the other 9 would stay full length.

Thank you, now I don't have to use up what is left of my brain power....lol

btw, how on gods green earth dod you get that off set on your fletchings ? I have a blitz and could not even get close to that. That looks like a 15 deg

Cool. Thanks for sharing.

will do some testing and see how the extra heavy shafts work, I use the 3555 shafts(black hunter) and the heavy FOC but have just left it at that, the hunter shafts are about 30-40 grains lighter than the traditional btw.. I subscribe to elknuts theory about lighter shafts 530 grain out of a 55lb longbow having more penetration than the heavier shafts up to 40 yards anyway and then the heavier shafts out penetrate the lighter shaft. But you are shooting a bit more poundage bow so you could shoot a bit heavier arrow to begin with, have you done any testing to compare penetration with the 600 grain arrow to the 740 grain arrow lets say at 20 yards ??

I've got a ton of 550 para cord lying around, would that work?

Dave

Need to post this in the "HOW TO" section great  

Dave, this would solve the issue we were talking about with the weight difference between black and camo shafts.

That's what I was thinkin bro

Great idea. I've personally  been using air tubing for fish tanks. Pretty cheap but gives a decent amount of weight. The down side. Like mentioned. Rattle. Really bad. But they don't stiffen spine. Probably because of the space. I'm gonna try you're rope method.  Can you tell us where you get your rope or where it can be purchased? Thanks.

I use CX 350s which is a very stiff spine for what I'm shooting, with a 100 gr brass insert and 200 Gr Kodiak mounted on a steel adapter.... Finished arrow weight of 785 grains...that's all I ever shoot and enjoy them immensely

great video thanks

Howler, I never did any penetration comparisons. I like the quiter bow and more forgiving flight of a heay arrow and thats the reason i use them. sorry cant offer more help on that one.
arrowlauncherdj, not sure if paracord is big enough diameter. you want the rope to fit as snug as possible so that it will stay straight and not bunch up. for my goldtip 3355 the 3/16 nylon works best. when i shot aluminum 2216 i used 1/4 polyrope. it was lighter eventhough fatter but it fit nice and snug in the shaft. what ever you try make suer it fits as snug as possible diameter wise.

I just tried the para cord and it seems to fit very well, I shot a few arrows and it seemed to fly pretty good, the para cord added 51 grains to my arrow.(I just checked) I thought I had the para cord from one to the other in the arrow, but I just pulled it out and measured it at 15 inches, so apparently on that arrow I have some blockage. not sure what to think about that. I will do some more experimenting and see what I come up with,,,

thats a great idea.

Cheap
easy
easy to find rope
easy to remove

i like it

I used this system myself for some time,then I decided to stay at 11 gpp so no need of a super heavy shaft.
I have to say that the cord for some reason makes the arrows more quiet if they hit something.

Thanks,
My set up flys great but needs to be about 50-75 grains heavier.

just keep in mind the rope has to be a little longer than the arrow shaft so that is stuffs in nice and tight. i would not put a 6 inch peice of rope in the shaft alone. That short section would slide from front to back in the shaft and not flie right. If you want lighter than 130-150 grains (what you get from 3/16 nylon) try a 3/16 braided poly rope not nylon. the braided poly will be about half weight so somewhere in the 60-90 "ish" area. sorry i dont have any to weigh and give specifics on the poly.  just whatever you use make sure it cant slide around in the shaft.

for those of you playing along.
if you read my earlier post I stated I used the plastic hose and that worked well but was noisy
I just went to harbor freight and got some 3/16 rope $4 (home depot $11)
I weighed the plastic hose and a length of rope 3" longer than the actual shaft as mentioned for compression...Heres what came up on the scale
 
 
As you can see the rope actually added a few more grains than the plastic and the MASIVE added Benefit of Silence...
You should be able to click and play this as a video:
It compares the 2, Pretty cool thanks LB_HNTR!!!
 

Side note I also Noticed at LEAST 6" of compression with the rope I got Some may have different densities...Which Might change things..
Havnt done the flight test yet tho...
Also I was able to get my shafts weight matched within 3 gr

My arrow is 32" long and currently weighed. It flys good and I couldnt find a shaft that would be just a little heavier without drastic spine changes. I put approx 35" of high strength parachute cord in (it happened to be laying there). The 35" of cord weighed exactly 100 gr. I shot the arrow 3 times and noticed no difference in flight. I was tired from a lot of shooting just prior to that so I stopped there. I need to shoot them side by side. I don't know if the trajectory will change much? I don't shoot well past 25-30 yards anyhow. So I don't think the 100 gr will show up for me.
Tedd