Home Made Practice Arrow Tips (for wood shafts).

Antler is tough and biodegradable. Like plastic but tougher and wont pollute so you can loose the tip. 

You simply cut a small section from a tine, stem, or paddle, vice it, drill a hole with a 3/8ths if it's a big peice or 9/32 for a smaller one, to accommodate the slightly tapered wood shaft end. If the shaft is too narrow for the tip and the tip slides about, still put a short taper on the end of the wood shaft, then put a paper or cotton rag over the end before ramming both into the antler hole.

It's optimal if you don't make a hole through the piece of antler and stop the drill just before breaking through the other side. If you do however, bend a cord of wire with some pliers into a U with a tail. Fit to the top of the shaft then push the hollowed antler tip over the cord and shaft. Ram down until quite snug.

Use an angle grinder or other filing tool to round out the bulbed antler at the tip of your arrow. I make a batch using pliers and round before adding to the shaft. The base should be tapered to the rim of the hole so that the tip won't catch and you loose it while retrieving. Don't make them too heavy; just heavy enough to take some hard hits and keep the weight forward on the shaft.

While on the topic however, a good archer can improvise any shaft and any tip weight as a true understanding of his tools function has been attained.