installing butt

[willloomy]

i bought a butt for my spear gun yesterday and i need to know how to install it.
JBL Loading Butt, Loading Butts - ScubasWorld
what should i use to cut down the back of my gun (currently a square block)

 

[pelcami]

Draw lines that allow you to make your square block cross section into an octagonal one - then shave.

The gadget below can help you draw the lines. Use a spokeshave to remove the rest of the material down to the lines along the shaft. Eight sided. Repeat to make a sixteen sided, then round it out. Dry run on a test piece of wood is recommended.

Though I used a jack plane instead of a spokeshave, I used this method to make oars for my fishing skiff.

 

[willloomy]

okay i thought of an idea to round the wood. could i use a hole cutter on a drill and cut off the excess wood?

 

[agbiv]

I never seem to have trouble installing butt -- however, losing wieght is a struggle. :t

 

[pelcami]

Hole cutter. That is a great idea. How did that work for you?

 

[willloomy]

i tried it out on a piece of wood and it worked well but i ended cutting it into a octogon with a coping saw then i sanded it round with a disk sander