See, that's the difference.
Most people are doing it as a hobby and a pleasant pastime. 
I was doing it to put gas in my snowmobiles and various mods on them and all my trips with them.   Also black powder and caps and ball and patches in my guns.  And an occasional new powder horn for myself.  Plus there was a certain profit thought for the business.
Big difference.
Big difference in one's attitude and an even bigger difference in the equipment and techniques.
John

8-12  a day, good Lord.
 I might do 8-12 a year, this is a hobby after all.
 I just kinda winged it, I've made alot of things over the years just starting with a picture.
 No idea what I was doing.
 Thank you for the compliments.
 Kevin

Last I heard, Lewis was working at Buffalo Arms up near Sandpoint.
That's not too far from Spirit Lake.
And Buff Arms is a pretty neat place.
Seems like something Kevin ought to do, if he can spend any time outside of his horn and black powder making.

I guess the two piece tacks are upholstery tacks with a brass top and a stainless pin.  They would probably work OK, but...
I am just not a fan of upholstery tacks on powder horns.  I rather prefer the escutcheon pins myself.  The 14 ga pins are what I always used.  Lately, I have been using 1/8" dowel.
Silly me, I never thought about Amazon as a supplier for brass tacks, I always bought mine through Clendenin Bros, but they have changed policies and only supply distributors.  I just didn't care to do that, so I have held off from ordering anything.
I did order some off of Amazon just now.  They should be here on Monday.  Evidently they are foreign manufacture, so probably made in China.  Oh well. 
Your Tansel style horn looks pretty darn nice.  A job well done, my friend.  I think I tried one once many years ago.  I didn't finish it.  Way more trouble than I had time for.  Depending on what I was working on, I needed to finish about 8 - 12 horns per day.  It was a grueling process.  Fortunately, I did have a guy working for me who handled all the sanding and such.
John

Never heard of two piece brass tacks. I'm sure everybody else knows what they are. But I don't. I'm not the sharpest tack in the pack.