@Dragonman.
Most, but not all, I try to keep my horn nocks fairly small, a longbow can be pretty cumbersome at the best of times without adding any extra length.
This pick shows my last one, you can see the
mistake feature
![Wink ;)](http://www.primitivearcher.com/smf/Smileys/default/wink.gif)
where the wood peeks through, showing that it actually goes deep into the horn. Anyhow, that's how I do 'em.
Del
PS:- Note sthe shape lends itself to using a stringer, which also pulls onto the wood filled section.