Converting from standard shank to Remington shank

[bigbandbone]

When I get back to my home shop in a couple of weeks I'm going to experiment with converting standard shanks to Brown and Sharpe taper shanks.
How many degrees of taper does a Brown and Sharpe taper have?

[sungfw]

https://littlemachineshop.com/Reference/Tapers.php

FWIW, there was a thread about the Remington shank on tromboneforum.org in which someone—possibly Doug Elliott(?)—mentioned that, contrary to conventional wisdom, the Remington shank was actually NOT Brown and Sharpe.

[Doug Elliott]

Correct. Everybody seems to refer to it as B&S but it's not. If you want to match the taper find a real Remington mouthpiece and measure.

[Slidemo]

So what is the correct taper on the Elkhart large shank Trombones? I was under the impression it was the Brown and Sharpe taper.

[timothy42b]

Correct. Everybody seems to refer to it as B&S but it's not. If you want to match the taper find a real Remington mouthpiece and measure.

Or, presumably he has a Remington taper leadpipe or he wouldn't need the mouthpiece. Would it be possible to insert something soft, maybe a warm piece of wax or crayon, and measure the taper that way?

Competitive rifle shooters use something called Cerrosafe to measure rifle chambers, but that seems like overkill for this.