I bet an incoming bowling ball has substantial deterrent effect.
Will this work on incoming grizz?
Absolutely! It's just a bit less handy than a rifle. It will shoot to 600 yds too, so that should generate some interest with some folks. I'd tell you more, but the rest is proprietary.
If you take the time it takes, it takes less time. --Pat Parelli
American by birth; Alaskan by choice. --ironbender