Welcome to the brave new world of bullet casting. If you haven't already done so you should check out the castboolits forum - there is wealth of info on tap there. Their reference section is well worth a visit too.
The LASC site is another good site for reference data and interesting articles.
http://www.castboolits.gunloads.com/http://www.lasc.us/CastBulletNotes.htm
