I pose a question for the readers of this forum. As lead shot is and will be eventually banned,steel shot will be the only economic alternate for most shooters. The problem is that we are trying to use steel in guns that were never intended to use it.
The 12 bore cartridge has changed very little since its general adoption 150 years ago, Ok components have changed so has the powder but in essence it is still the same and bore sizes although standardised across the world have remained unchanged.
Compare the 8 common shot gun bores the the hundreds of rifle calibers that have come and gone in the same period. Thus we need to start from scratch and design a new cartridge.
The challenge is to design a ballistically perfect cartridge that will replace the old 12 Ga [et al] 1& 1/8 oz load. Then to design a barrel to shoot it from . It may end up as an 11&1/4 Ga 2 &11/16 ,or some other weird size, you may need 2" chamber cones and continuous taper chokes . I don't know. I have neither the knowledge or skill with computer aided design to do so,but I see no reason why it can not be done.
Lets be honest there are millions to be made and if you do, please remember it was my idea.
