Get to the point!
Assuming you have already straightened a cane dart shaft or are using an aluminum or carbon dart shaft, its time to put a point on it.
For the aluminum or carbon dart shaft, use a standard size archery arrow insert for the size of aluminum or carbon shaft you are using. The best way to make sure you have the right sized insert is to physically haul your dart shaft down to the archery store and buy the insert that fits. Use the heaviest field point you can find. threeriversarchery.com sells 250 grain field points which are the best and largest I have been able to locate.
Option one, see picture below, is to use an aluminum gutter nail. I glue these nails in using PC-7 glue which is an epoxy glue that comes in two cans. Mix even amounts of from each can on a piece of cardboard. It has a fudge like consistency that does not run and when dried (24 hours), it can be sanded.
Allan Bagg makes copper points by swagging copper tubes into bullet like points to fit any outside diameter dart shaft you might have. These points slide right onto the shaft and can be glued using any epoxy or hot glue. I use PC-7. The points cost $3.00 each.
Option three, the foreshaft option: For my cane darts (bamboo or river cane), I make a 12 inch foreshaft using 1/2 inch diameter Poplar dowel rods. Into one end I drill (using 1/4 inch drill bit) a hole about 3/4 inch deep to receive a point made from a 1/4 inch diameter copper rod. I then shape this end of the foreshaft into a cone shape using a rasp and sandpaper. One end of the copper rod is cold flattened via hammer and cut to a point using a cold chisel and file. The still round end of the point is then glued (PC-7 glue) into the foreshaft.
More glue is then spread onto the foreshaft for about two inches from the point. I then wrap string around the glue, put more glue on the string, and then, using a folded paper towel, spin the foreshaft lightly onto the paper towel to smooth out the glue.
At this point, you now have a pointed foreshaft that needs to be fitted into the dart shaft. Using a 3/8 inch drill bit, I drill a hole about 1 1/2 inches deep into the fat end of dart shaft. I do this by hand, holding onto the dart shaft with one hand and drilling with the other. The dart shaft can spin in my hand if I hold on loosely as I drill. If I am going in straight and clean, the dart shaft will spin accordingly. If I am off the dart shaft will spin wildly. Its a cheap thrill.
After this, I rasp 1 1/2 inches the butt end of the 1/2 inch diameter foreshaft down to 3/8 inch diameter and glue it up (PC-7 glue) and slide it into the dart shaft, again using the folded paper towel to smooth things up and wipe away any excess glue. Let dry for 24 hours.