A bit of info on the gun(s) from a Collider article:
Hellboy, known for his signature revolver, gets two guns in the reboot. “He loses [one] quite quickly and then he’s presented with this gun,” says a rep for the prop department, turning his attention to a 1940 Austrian revolver that fires about 38 blanks.
Not sure what the takeaway on all of this should be - these kind of journalists never seem to fully comprehend what's being conveyed and there's always a bit of "lost in translation." I'm wondering if the "fires about 38 blanks" quote is actually referencing .38 caliber blanks, i.e. the "Austrian revolver" is chambered in .38 caliber.