I want to make a large barrel wrench that will cover my needs into the future.
One that will except bushings for the different barrels I encounter.

I've borrowed in the past. (to send stuff out for finish or rebarrel work)

My plan is to make one something like the Brownelll's but only slightly larger.
Basically, two large 1018 blocks 1-1/4” by 2-1/2” and 1/2"-20 screws to pull them together.


I think rather than have a round bushing cutout I prefer it will have an unique shape.

I will cut out a triangle in each half forming a square on end. Points at 3 & 9.  Ah... but I will drill where the top point and bottom point would be with a 1” drill, before cutting out the rest.
So it will have points at 3 and 9 o'clock and have 1” radius at 12 and 6. The (almost square) bushing will be 1-3/4” between parallel sides.

I wish I could offer a drawing.

This sounds hard but really it will make both the wrench and bushings easier to make, and easy is good. I have not done barrel work and so I am looking for options for bushing stock. Aluminum, Nylon, Hardwood are all options I have heard about being used successfully.

One end of the clamp portion will be d&t for the 3/4” handle

Feel free to add ideas or troubleshoot.