I have a good little tool for making the fit perfect.
Get a chunk of something hard and drill a hole in with your bit a deep deeper than your finished intended depth of cone. Then get a tenon saw or similar and cut a slot into one side of the cone hole (the full length of it).
Then get a bit of sandpaper, insert it into the slot, pull a bit throught so it touches the other side of the hole.
Push onto your rough shaped cone and rotate. It then sands off the high spots until you have a perfect fit.
Easy peasy!
What I do is just shove a triangle of sanding belt into the horn itself and rub it on the bow tip to get it close. Than I take the sandpaper out and just rub the horn on the bow tip. The high spots will get rubbed and burnished, and look kinda shiny while the low spots will not get touched. So I will remove the shiny spots, and repeat until the horn fits good with no play. Man, I made some horn nocks for a guy recently. He was surprised that the hole in the horn was not "square". I told his I could not drill a square hole, and that it wouldn't work anyway. (the pictures of them clearly show a round hole anyway). He insisted that he usually buys horn nocks with square holes, from the man who makes horn nocks for 3riversarchery, who he says recently passed away and was his friend. I don't understand though, a horn nock with a square hole would not work? I tried to explain to him that an english longbow is not square. He said he wished I would of drilled the ends in a d-shape, so it would work with a d - cross section. (
) I explained that a d - section bow is still round at the tip....
I made a video for him showing how I put the nocks on, and linked him to del's blog and a thread where I did some horn nocks. He still insisted that the english longbows he made would not work with the nocks because the nocks I sent him were drilled
"circularly"...
...
Ok, I will stop going off topic. I think horn nocks are fun too once you get a hang of em. I use a straight taper, I feel like it doesn't matter too much also though. I think it makes tons of sense that they would of used the natural hole Cameroo, it would save so much production time.