But, maybe your local butcher would have cow skulls.
And a rug, that's probably the one thing that would be available at gander mountain.
First off shooting a dried out skull is nothing like shooting a living skull still full of collagen, with living tissue, surrounded and stabilized by dense muscle. Even portions of the skull not surrounded by muscle have the vibrations that can increase shattering effects dampened by being in proximity to the muscle while being full of collagen and living tissue.
So a skull is not a skull. Living skulls have very different properties than dead skulls.
Second, you would think every US citizen lived near grizzly bears. This and similar questions come up at least once a month.
In the lower 48 there is a little more than 1,000 total grizzlies. In Alaska a little over 30,000.
There is over 301,000,000 people in the USA.
So that means for every Grizzly there is close to 10,000 people.
1-3 cubs are usualy born in a litter, and stay with thier mother several years, during which time she usualy will not mate or have any more cubs.
So they have a slow population growth rate.
If just 1% of 1% of the population or .01% of the human population in the US killed 1 grizzly within a 3 year period, they would be completely exterminated.
If .01% of the population killed 1 grizzly in a 10 year period, they would be exterminated within a 20-30 year period.
In fact the decline happens faster than just numbers show once they get below a certain number, because finding mates is very difficult.
To actualy have a growth rate larger than a decline in thier population, very few can be killed in a given year.
So defending yourself against any dangerous animal intent on doing you harm is important. It should be avoided though if possible.
Yet people who live in cities across the country have this fascination with using a technological advantage to easily dispatch a critter they will likely never see in the wild, and which they could avoid problems with most of the time.
In fact by understanding the bears body language and behaviors you can avoid most problems.
A lot more than you can say for many potential human attackers that you are far more likely to face.