Well, I finally crossed the line.. {In my mind anyway} and bought 3 dz Gold tipps to go along with my new set of 45# BW limbs. They come out to be about 10.5 grains per pound. But I would really like to bump them up another 50-80 grains. ...Been tinkering with weedeater line but I can hear them raddel in my quiver... Even used the heavy line and some elec. tap... still can hear it. ....What do you guys use to add weight??? Really dont want to load up the front cause they are shooting so well and I got them the length I want them as well as the point weight.

When I first started messing around with carbon I tried weed whacker string, it was just too noisy, and it would make my nocks pop off all the time. Instead I started loading up the point, this seems to work the best, I shoot a Titan with GT3555's 50 grain brass insert cut to 29.25" with a 145 grain point. They weigh in at 475 grains. I have been messing around with an internal footing, by gluing 1/4 inch wood dowel cut to 1.5 in the point end as well. This has added around 15 grains. Stuffing them works but for the heck of it mess around with FOC.

I just use 3 gpi weight tubes,will add around 80-90 grs. depending on the length and don't rattle.But 10.5 grs. per pound is pretty good,I like to shoot 9-11 grs. per pound.

I've tried everything to get my carbons heavier. If you must use the week whacker line I solved the problem of noise by simply making kinks in the line about every 4 to 6 inches apart. The kinks make the line actually press against the shaft and your noise will disappear. Make them pretty severe. However, weedwhacker line and other "stuffings" have idiocyncracies that made it less that ideal. The final solution for me was to go with heavier points or as some refer to it as heavier FOC. It eliminates all the fuss about using and finding other materials that create other issues. Plus you get the added advantage of a hunting arrow that will improve in penetration capability. The ONLY drawback is that you may have to experiment to find the correct spined shaft and a decent broadhead weight (lots of ways to achieve that) but in the end you will have the best solution, IMO.

I tried the wheedeater line, and weight tubes---didn't like any of them. I've found that point weight and brass inserts work the best IMO.
My CX Heritages weigh in at 610 gr.: using 100gr. brass insert and 150gr. points.....

Ben

I use electrical wire rubber insulation. I pull out the wire part and use the rubber coating.  If I really want to add a lot of weight then I'll leave the wire in.  I found a roll at Wal Mart cheap. I just shove it in and cut it even with the end of the arrow.  When I put the nock in I have to push a little hard but because it is full length of the arrow and shoved against the nock keeps it from moving.

Small diameter Poly Rope, Quiet ... Good Luck ...

You can use fish aquarium tubing, but you may still have trouble with nocks popping off once in awhile.  You can get a threaded nock adapter for the GT's and add weight to the nock and point ends, so you can regulate the spine, or as suggested above, go to a stiffer shaft (or cut the one you have back to stiffen it) and front load it.

3/16 clothesline rope works great. It's quiet, cheap and if you burn the ends before you insert them you can pack them in the front with a small dowel or gun cleaning rod and really boost your FOC and it doesn't move.

Take a note of  stone knife comment, nocks popping out. I did have nylon rope in mine and the same problem, On impact the rope travels backwards and this will reduce penetration, hang weight at front.
ASL

I also had the problem with weedeater line rattling. Something I tried 3 days ago....speaker wire!
I had a couple rolls of cheap speaker wire in the shop, cut some to length, and stuffed in the Gold Tips.
I put my inserts in and just got them fletched yesterday. I only shot 2 of them before I had to leave for a Bar-B-Q but so far....they work great!!!
I'll get more practice with them today, a bunch of us are doing some shooting today at a Bar-B-Q.
Speaker wire is pretty cheap also.
Lets keep the good ideas flowing.

If you use the cotton clothes line rope it won't bounce back and burning the ends will make them just a bit bigger than the I.D. of the shaft so the stay in place.

I have uesd 3/16 dia. rope with good results.

I have not tried it but I have heard of people using black pepper to load the shaft. You could fill the whole tube or measure out the weight you want with a grain scale. Pack the pepper down with a small dowel that closely fits to the ID of your arrow.

If you don't want to fill the arrow completely you can keep the weight forward with a small piece of cotton soaked in super glue gel. I would make sure the dowel I used to pack the cotton in with was very smooth and give it a twist to make sure the cotton stays in place. I wouldn't use the quick drying super glue unless I was very sure I could get the dowel out quickly enough.

Choctaw

I use the 3/16 poly rope and it seems to d a good job. Does not move and seem not to change the spine of the arrow.

I have my 500 spine arrows now are at 460 grains to 475 grains. this made up for my 50 lb checkmate bow, arrows are cut to 29 1/4 and fletched with 3 5.5 feathers and 125 gr field point or BH...

Bill

Bill that comes out to about 9.5 grain per #... Is that the arrow that you hunt with???? I like mine about 11-13 grain per #... and with me switching to ultra lite tackel (lol) I really want to stay on the heavey side....

i use the 5gpi weight tubes along with the brass inserts and love em they really bump the weight up are quiet and hit like a ton of bricks

i was thinkin of using the weight tubes... but they cost so much..

How about a 1/4in hardwood dowel. You will also increase point weight due to spine weight increase.

Ive got a couple boxes of the wt. tubes you can have. If you want them just pm me your address. Its a box of yellow(3 gns/in) and box of white(7-8 gns/in..?). I dont care for my arrows being over 10 gns/lb, and these wt tubes always put me over that. Either way , good luck. Shane