I read it can be used in center fire 38-55 cal.
I like to ask can you use a regular powder thrower for measuring charges?

http://www.blackhorn209.com/load-data/

I am aware of another member that uses a Redding powder measure to throw his charges of BH 209.
A scale to adjust your measure correctly is required.

240 RNFP LC 0.380 Fed 215 2.535 27.3 1,481 13 25,750 103%
27.3 grains :now is that setup with a smoklees powder scale measurement: ??????

I believe that you are looking at the wrong data. You want the muzzleloading rifle data that is provided in the link. You can use that Lee Powder thrower with blackhorn 209, just follow the data. I used it a couple times and it works with BH209. It is best to throw a little lower than what you want and then trickle the rest until you get desired weight on a scale of course.

I believe that you saw that load listed on the Blackhorn metallic cartridge chart for 38/55.
It lists the charge weight in grains. That weight in grains is just a bit under what you would get if you set your black powder volume measure for 40 grains by volume of black powder. Make sense?
Weighing out 27.3 grains of Blackhorn for the 38/55 case with a 240 grain lead or jacketed bullet would be a mild to medium load in my opinion.
Hope that helps.

Blackhorn metallic cartridge chart for 38/55 : correct
I now load IMR 3031 33.5 grains with a soft lead bullet 255 FP (bhn 10) no gas check
This bullet in my 38-55 will drive tack groups all day long
I was going to see how it will shoot with the BH209