This is just my opinion, but when I originally started my rifle shell pens, I too, used the nib from the slimline kits. They just didn't have that real look that someone expects when they think of a bullet. So that is why I went to making the real deal! Plus, people know they are getting a genuine rifle shell in a pen and you can charge accordingly. Another thing to remember is the finish on the antler. Try the CA method, get a quality finish on it, and watch 'em sell even faster! Practice practice practice! here are a couple of different styles that you can make:
this one is using a cigar mech
this uses Berea's twist upper
this uses a cross twist and the clip and finial from the euro pen. Check out:
http://www.woodnwhimsies.com
for pen parts. My point is, dont under sell your work. But at the same time, make it look your best! Let your customers know the amount of work involved in making each and every pen. And lastly, stick to your price! Even though this may be your hobby, think about the things you could be doing with your time besides working for less than minimum wage on a bunch of pens that you hope brings you some business. I charge $75 minimum and if people dont like it, then I tell them that I hope that have luck finding the same quality for cheaper somewhere else. Anyway, enough of my lecturing. Do with it what you will. Thanks for reading