I’ve yet to kill anything with a 200gr partition, but I can testify that foster slugs are absolute garbage as a projectile to be used on brown bears. I maimed a grumpy one with 12ga fosters years ago. The fiasco involved a lot of roaring, shooting, and slide shucking until matters were properly settled by a .458 and a .375.
One of the best ways I know for a person to instantly demonstrate ignorance is if they use/recommend foster slugs or buckshot for bear defense.
Well, sure. But the smart way to go is to alternate slugs and buckshot. (/sarc)
If you take the time it takes, it takes less time. --Pat Parelli
American by birth; Alaskan by choice. --ironbender