Has any one ever used a reamer to make a case length gauge out of hard wood.?

I realize the moisture content of the wood might 
have an effect on dimensions but thought it would be an interesting no cost experiment.

TIA

Bob

I think maybe an easy method would be to make it out of aluminum as the reamer will cut aluminum easily. Just need lots of cutting fluid to avoid the aluminum from sticking in the flutes of the reamer. And pull it out often during the process to clean.
There are some hardwoods that are harder than aluminum, but also affected by humidity still.

Nylon or delrin. Aluminum has a high coefficient of expansion.

Delrin, now that sounds promising.
thanks..

Ideally I want to take two blocks of material, mate them temporarily, (like a bullet mould) then ream down the center so that I can place a case in one half to visualize how long or short the brass is.

This particular reamer has a very gradual transition from the case mouth to the freebore and then again to the leade. So gradual that it is difficult to tell from just pushing the case in the chamber if a long case is   
being pushed beyond the case mouth to freebore transition.

I'm not trying reinvent the wheel as one well respected contributor mentioned in a prior thread on the subject, this is more a muse or matter of curiosity for me.[/media]

Rebel wrote on Feb 13^th, 2023 at 12:22pm:

CTE of Delrin is roughly 4x of aluminum. Whether it matters depends on what you're trying to do.

Setback gage for bottleneck cases, really doesn't matter, you're just looking for a difference before/after running it into the die.

Looking for seating depth, a small change in diameter makes a big difference at the shallow angle of a typical throat. 

My go to is 416 SS. Stable, wear resistant, and cuts like butter. A foot or two of 3/4" will last a long while.

Don't overthink this.  All he's trying to do is see where his brass length falls with respect to where the throat starts in this peculiar chamber, which he says transitions from the neck to the throat via a very shallow cone.  Objective being to set a trim length that keeps the brass mouth from getting into the constriction area without cutting it unnecessarily short.  The "gage" will likely be used once and then put aside. 

I ordered a few clear plastic rods of varying diameters from Professional Plastics to check homemade and rental chamber reamers with.  I drill and/or bore a pilot hole, and go slowly with the reamer, using WD-40 (yeah, I know) as the cutting lubricant.

Done properly, you can see the way the loaded round fits in the chamber without having to section it or needing X-ray vision.  I doubt if the difference in expansion coefficient or moisture content between plastic and barrel steel would make any difference that a shooter could determine.

It also picks up nicks or dull spots in the reamer as white circles in the otherwise clear “chamber.”

Not sure how well you will be able to see the case or loaded round in machined clear plastic unless you will be polishing the machined surfaces. 

Worth a try though.