Playing around with Spent Brass Bullet Shells...

I have a whole bunch of brass bullet shells (all ready been shot, no danger involved) that I'm dying to use in my art jewelry.  I am wondering if anyone can tell me how to cut through them?  I've tried a dremel, but it doesn't give me enough control.  I've also tried a jewelers saw, but I keep breaking the blades.  If anyone out there has any advice or ideas on how I can cut these babies, please...let me know.  They have so much potential.

Here are a few more photos of what I've done with them so far.  I have many more ideas and would love to hear your ideas as well!  What do you think?