>>3472049i'm really not a fan of overexposing an entire roll by a set amount. i shoot superia 400 a lot mostly at box speed but erred to the side of overexposure. try spot metering your subjects with a light meter or phone app. the needle meter in my SRT201 is off so much that I shoot just with a light meter app which has demonstrated itself to be very accurate.
i meter either for the subject, when it's a person, or for the shadows in a scene with good results.