Volpone
Zombie Hunter
This is way too much head-canon for an intentionally pulp-y movie but... In "Raiders of the Lost Ark," Indy has the revolver in a holster on his belt--but he also has a Browning Hi-Power that he uses in the shootout at Marion's bar (he also carries it when the Germans board the steamer). Why 2 guns?
"Raiders..." is set in 1936. The Browning Hi-Power wasn't released until 1935*. So it is a brand new, relatively unfamiliar gun. Indy maybe keeps the revolver because he doesn't quite trust the new-fangled autoloader. And it must be in his satchel*, possibly because it is so new a gun that he hasn't found a decent holster for it.
*We can't put too much into historical accuracy. As mentioned, the movie is set in 1936 but Indy's satchel is a British WWII gas mask bag that wasn't produced until 1941.
"Raiders..." is set in 1936. The Browning Hi-Power wasn't released until 1935*. So it is a brand new, relatively unfamiliar gun. Indy maybe keeps the revolver because he doesn't quite trust the new-fangled autoloader. And it must be in his satchel*, possibly because it is so new a gun that he hasn't found a decent holster for it.
*We can't put too much into historical accuracy. As mentioned, the movie is set in 1936 but Indy's satchel is a British WWII gas mask bag that wasn't produced until 1941.