I have made a few horns & and not artistic about it as horns are not really my thing. However, having made a couple dozen of them, I have a lil experience at it. I found that most of the horns were shaped differently & of different size, thus by the time I made the cone I could have made the horn base or plug. So I always make each one to fit by layin the horn over the piece of wood & drawing 2 lines, one at the edge & then one about 1/4" out from that line, remove orn & now draw one line Inside the inside line considering the thickness of the wall of the horn. Turn the plug on its side & make a depth line, now cut down to that line with saw, chisel or lathe , depending on how you decide to do this. Now trim & fit the plug to go into the horn making adjustments of both til you get a perfectly flush fit. Then I mark my pin holes & I usually put in 2 lil screws in 2 opposing holes so I can remeove the plug when necessary. Work the outside of the horn to what I want & when finished I use thorns for pins or make lil wooden tapered pins to attach the plug to the horn.
Lots of dif ways of making horns, mine being a utility type horn & more of what you would have seen in use rather than something for show. Lots of books available on makeing them also. For making flat horns you need to boil them in oil & then push a flat plug in them to retain the shape you want. Again, I am not a horn maker however I am told that boiling them in oil gives much better results tham boiling them in water. (thos I have not done it myself) Several articles in past Muzzleblasts on horn making & had a 3-4 part horn making instruction class type of thing in 2003 or 2004.
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