Except the chances of being attacked by a bear is much higher in rural country than being part of a mass shooting. Nobody said anything about being killed by a bear, but if you live in, say Alaska, you are more worried about bears, individual human criminals , and other wildlife, than mass shooters.
In terms of individual deaths caused by guns it's 11,683 in 2017 so far and 2 to bears. Injuries from guns is just under 24 thousand people this year so far.
You might be worried about a bear... but you're literally 6000 times more likely to die to a gun than a bear in USA. Heck as per http://health.howstuffworks.com/diseases-conditions/allergies/food-allergy/peanut/how-many-people-die-each-year-from-peanut-allergies.htm you would be saving more lives if you took your gun into a store and started unloading into peanut products as they are 35-50times more likely to take a life during 2017 than a bear.
Fancy hearing me on an amateur podcast with friends gushing over one of my favourite games? https://youtu.be/1I7JfMMxhf8