I found this the other day and thought it was interesting.
http://www.youtube.com/watch?v=k3M46XVfVOU&feature=player_embedded
Rather than beating the safety horse to death on the obvious hazards of doing this, I'd rather focus on the concept. Especially if it was used in prior to the invention of the slug.
I wouldn't recommend loading them into a chamber on even a pump (let alone a semi), but I think there are ways you could "score" the line rather than "cut" the shell that could aid in pump loading and give you some stability and safety for muliple rounds.
http://www.youtube.com/watch?v=k3M46XVfVOU&feature=player_embedded
Rather than beating the safety horse to death on the obvious hazards of doing this, I'd rather focus on the concept. Especially if it was used in prior to the invention of the slug.
I wouldn't recommend loading them into a chamber on even a pump (let alone a semi), but I think there are ways you could "score" the line rather than "cut" the shell that could aid in pump loading and give you some stability and safety for muliple rounds.