So for a learning experience I took a roll of Tri-X 400 Kodak Film and shot it as if it was actually 800 ISO.
I can see how this is useful when shooting indoors as even with my lumu light meter those images exposed well. My problem came if I had the camera outdoors. I couldn’t prevent overexposure it seems (I do not own a ND filter for my film camera).
You can see the results below that I felt were worth to share (both good and bad):