You might enjoy reading about Anglo experiments in Heyday of the Shotgun by David J. Baker pp. 91-92 Guns Without Cartridge Chambers. There might be something of interest in chaper 10 The Cartridge of the Heyday. Great lil' book I got at Border's for $39.95 minus 40% member coupon.
You proly aware there were at least two types of brass shell one just thin brass and second with brass cartridge base extending over almost entire paper case. You can see variety of ole' Anglo shells in shell collectors corner of each issue of Shooting Gazette. Neat page Joe.
