The reason I came here is I'm trying to plan a crossbow build that will give me the best possible hard target penetration.
Currently I'm using a 150lb barnett (fiberglass prod no cams) and a 60lb bear (modern split limb compound) with modern "big game" fiberglass bowfishing arrows and the power/penetration is completely unsuitable, my arrows are bouncing off.
What I'm hunting is alligators (from a boat with license/tags) and they have extremely heavy scales over most of their back. Now the proper way to shoot one is to get a broadside shot and hit them low in the neck/side where the skin is soft but this isn't always possible and many times the animal dives before I can get a shot like that.
So I want to build or modify a crossbow that will penetrate about half an inch of solid bone scale on the head or back of an alligator. The normal shot is 3-8 meters so it doesn't need to shoot very flat just penetrate extremely well.
I'm open to about any design from the oldest to newest even a torsion or rubber powered bow and I don't mind spending some time or money to build what I need. Draw weight can be about anything and the bow can be about any size or weight however it must be managable enough to fire it handheld, mounting it on the boat like a whaling harpoon is not legal.
I have a basic shop with a lathe, mill, grinders, welders and normal woodworking tools saws/drills/routers.