Initial playing-around with timber arrow EFOC jig...

[jchunt4ever]

I am not sure if its available down there in Australia or not, but how about using lead solder. I believe it should be heaver than the nails or welding rod even though its not pure lead. Just a thought, as its a whole cheaper and easier to come by than Tungsten here in the US anyway.

[longstiks]

I put 2 1/2" of welding rod in some chundoo arrows and hit two trees with them. One was a direct hit on a six inch maple that bounced the arrow back at me about ten feet, the other was a side hit that stuck to almost the entire tip and was removed with a knife. Neither arrow was harmed in any way after the shot. This was not an experiment, I just screwed up my shot   . Works for me.The shafts were 70-75 shot out of a 57# bow.
Denny

[Benny Nganabbarru]

Yep, I accidentally hit a tree with one of the arrows I rigged-up, and it was fine. I think 2.5" is a very good amount, as not much internal leverage can occur. I think I will be sticking to something around that, rather than 5".

[Pete W]

Tungsten from a welding supply place is the real deal. It is used as the electrode not the filler metal for TIG welding.

Pete

[Fletcher]

I've been working with 1/8" lead wire.  It is 35 gr/in, very easy to work with and you don't have to hock the house to buy it.  I drill my hole with a #30 bit using a drill press with a jig I made.  I can get 3", but 2" is more practical and quite easy.

When combined with a light shaft and a heavy head I can get the magic 20%.

[tecum-tha]

Ben, I have made extensive tests with this method of adding weight. And unfortunately it is really only good for adding weight. There is no gain in strength against extreme targets. I need to upload some test setups onto youtube.
All shafts did not survive my concrete target, wether unreinforced or reinforced. Tapered ash and tapered maple shafts do survive. I did not break one yet...
For cedar arrows there is a good way of footing that will enhance the durability a lot against harder targets (equals less breakage).
PM me for the webadress, since he is not a sponsor here (yet)...