In a way, with this, each bullet is like a miniature percussion cap musket. Ammunition robustness isn't only important for plastic guns: witness the explosion

In a way, with this, each bullet is like a miniature percussion cap musket. Ammunition robustness isn't only important for plastic guns: witness the explosion of an 1895 Lee Navy, where the use of relatively thin .30-40 brass (since original 6 mm ammo is not available) is suspected to be the culprit [1] [1]: http://www.forgottenweapons.com/winchester-lee-navy-safety/ http://www.forgottenweapons.com/winchester-lee-navy-safety/