When Varrett takes revenge on the clowns, he fires of 4 shots with the shotgun. Before, he only loaded 3 shells.
When the deputy practices with his shotgun, the same can is shot twice, without being replaced.
Early in the movie when Austin checks into the motel, you can already see the bullet hole squibs and wiring on the wall way before the shootout even begins.
While Pierce County is located in Washington, there is no town called Hope. Also, there would be more deputies as the county seat is Tacoma.
Near the end, deputy Hedge find his father (Sheriff Cole) at his desk allegedly after he committed suicide. Sheriff Cole is very clearly still breathing though.