Here's what the Ohio DNR says about Shellcrackers.
"Shell crackers are shot out of a 12-gauge shotgun and travel about 200 feet before exploding. It is advised that an inexpensive single-shot shotgun that breaks and loads at the breech be used. This is to allow for inspection of the barrel after each shot (shell crackers can lodge in the barrel) and ease of cleaning after use as shell crackers leave corrosive residue in the barrel. It is also important that an open choke (improved cylinder or less) be used as opposed to a tight choke (full or modified). This will ensure there is no restriction when the shell cracker exits the barrel."
