If you have not been to AR180s.com site you should drop in and check it out. He just finished a comparison on AR-180 bolts that is quite interesting and well worth the read.
I hope to be adding to his article as I will be sending him pictures of the SA-80, Leader and Bushmaster rifle bolts and bolt carriers.
I will also not be in the shop this weekend as I have to make a Arizona cross country trip. Not everything is work, just most things. I hope to be back early tomorrow afternoon.
One last note. A friend of mine in Germany was able to track down a book on the 7.92 kurtz cartridge that I have been looking for.
The last page so you can try and find it.
I tried to contact the author and publisher for a copy but never received a response.
Interesting picture on page 221
While the book is written in German it still has a great deal of useful information and pictures. Maybe one day it will be in English.