My tradepoints weigh about 120 grains. I make them out of large nails or steel rod. I just flatten the steel with a hammer to about 1/16" thick, tapering it from the tip (thinner) to base (thicker), and grind to shape with a bench grinder.The tang is about 2/3 as long as the body and I cut shallow ridges into the sides of the tang so that the sinew or thread grips the trade point and prevents movement. I taper the tip if the arrow shaft and shape the tang to match this taper exactly...except the tang is about 1/32" wider. I cut a slot into the tip of the arrow shaft with a scroll saw and glue the trade point with hide glue or fish glue. I then wrap the point with sinew or cotton thread (soaked in glue)...going past the base of the point by 1/2" or so. My points are about 3/4" wide. If you're making hunting points, they need to be 7/8" (or more) wide in most states.
This picture shows two trade points made from nails, glued with fish glue, and wrapped with sinew.
These arrows have been shot at least a hundred times each (sometimes into the ground) with no problems other than the occasional straightening of a bent tip.