I wouldn't think big, slow, soft projectiles like those would penetrate deep enough in a big, tough critter like a Kodiac.
DF
Brennekes really are the standard by which shotgun slugs are judged. But, there are better slugs these days, like Remington Copper Solids. Usually a deer won't catch either, but if the dirt on the other side is any indication, the Copper Solids out penetrate the Brennekes.
That said, you just don't get the high velocity secondary missiles from a shotgun impact like you do from a high velocity rifle.
