Factual error: After coming out of the pit, Ash gets three shots out of a double barrel shotgun. There was a sound of cocking when the shotgun has to be cracked open to re-load.
Factual error: When all is back to normal and Ash is back at his job at S-Mart, a witch shows up and starts trashing the place. Ash is knocked behind the sporting goods counter, where there is (of course) a cabinet containing guns. Ash then jumps up and blows the witch away, firing 37 times. He's using a .38 caliber Winchester Model 1892 Saddle Ring Carbine with a "Trapper" loop lever. It only holds 9 rounds.
Answer: Towards the end of the film, when Ash mounts his horse and rides off into the sunset (before it then cuts to present day and he's back at the S-Mart), you can see his chainsaw is strapped to the horse's saddle. It seems that he either recovered it after the battle or perhaps he sent someone to the windmill to retrieve it.