Raiders---
S & W Hand Ejector--a couple of 'em, because, remember, he was disarmed at the very first while in S. America. While he was gearing up to leave the country, he tossed another S&W into his baggage. I'm pretty sure it was a Second Model, but might have been a Third--
And there's no way to tell what caliber--Could have been .44 Special, .45 Colt, .455, or any combination of the three. But, in at least one place, we could see individual cartridges, without half-moon clips.
lonegunman--Definitely not a New Service Colt. N-Frame Smith, for sure.
No Browning High Powers in any of these movies--He used a 1911-style, both in the Tibetian bar fire, after shooting his S&W dry. One of the adversaries had a broomhandle Mauser. Dr. Jones also used a .45 Auto later on, on the freighter, when he gets up to see what's going on, about the time the Germans board from the U-boat. And, though it doesn't count as a sidearm, he used a panzerfaust as a threat.
Temple of Doom--Remember, he lost his revolver early in the movie, and never got another or his own. I just checked it out, and all I could tell about the one the girl dropped during the car chase en route the airport, it was a douple action, and was probably an S&W or Colt-Not a Webler.
Last Crusade--Definitely used a Webley Mark VI. I can't find my copy right now--probably loaned out. But I have no recollection of him reloading, and, failing specific evidence, I'll say his Webley was in original .455, NOT modified to use .45 ACP.
Best,
Johnny