Baseline (Widescreen) Solution & Issues
The game supports widescreen natively, however FOV is very low and is set 46. For higher FOV download Call of Juarez: Bound in Blood Realism Mod. If you not interested in any change in the settings, in addition to FOV, follow the description below.
1.) Download Realistic Mod from link below.
2.) Open Call of Juarez: Bound in Blood folder
3.) Make a backup of the Data0, Data3 files, because you are going to replace them.
4.) Replace the original files (Data0 and Data3 except DataEn) from the folder ''Custom Field of Views''. You can choose FOV 57, 65 and 75.
5.) Now it is finished and run the game. You have to start a new game because old saves will not work.
Remember don't replace DataEn If you don't want to change the story, ignore the DataEn file and just replace the two others instead.
Download a mod from here:
https://www.moddb.com/mods/call-of-juarez-bound-in-blood-realism-mod
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
Eyefinity / Surround Specific Solution & Issues
4k UHD Specific Solution & Issues
The game supports 4K Ultra HD natively, however FOV is very low and is set 46. For higher FOV download Call of Juarez: Bound in Blood Realism Mod and follow the same way as above.