I took several shells and loaded them up with salt and decided to test them out on some paper targets.
At close range, it had almost no spread, and hit the target as a relatively solid mass…and with a lot of energy. Suffice it to say it would have done serious injury to a person.
Increasing the distance rapidly changed the impact and it didn’t take long until it barely had enough force to penetrate the paper.
I came to the conclusion rock salt in a shotgun was not a very viable option. Of course my “test� was unscientific, but it was good enough to back me off.
The problem I had was a very narrow range where the salt would have the desired effect. Inside that range and it could be just as injurious as birdshot…outside the range it would have no physical impact through average attire. It just didn’t sound like a good option…