Having made lots tactical bolt knobs, I learned that like knife handles and chisel handles, it is best to copy the shape of something I like.

I found the shape of the Glades tactical bolt knob for Rem700 is the best shape for me
http://gladesarmory.com/tactical-bolt-knobs/83/remington-700-oversized-tactical-bolt-knob-.html
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They are only $30 and I could save lots of time by buying one, but they are made of anodized solid Aluminum alloy making them cold and heavy.
So I use the shape.
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This may look boxy and not the same shape, but after sanding, it is the same shape.
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And I put a coin in the end for decoration.


Here is an 11 minute video of me making that knob.
https://www.youtube.com/watch?v=epjXe_tpFUk


There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway
The man who makes no mistakes does not usually make anything.-- Edward John Phelps