Jack O'Connor wrote quite a bit about using 1 ounce loads in his 28-gauge Eusabio Arizaga. I've used these compression formed Winchester and Winchester-Western 28-gauge shells in my RBL for Pheasants --



and the Pheasants seemed to be just as dead as if they had been hit with a 12-gauge.

The box of paper Western Super-X MAGNUMs I've owned for a long time but it is still full. Probably from the time Cactus Jack was using them.