This mod for Red Dead Redemption 1 makes the game more challenging. Attention: the mod affects not only hardcore mode, but also normal mode.
Changes have been made to the xml file to allow John and Jack to go into critical condition more quickly when hit. One shot already turns the screen very red, and with one or two additional shots the character dies. Headshots are lethal and cause instant death.
There is also a version without instant death from headshots.
Installation:
Unpack the archive into the root folder of the game with a replacement.