I got 380x5 pretty easily on deadlifts a few weeks ago, and I am always higher than 1 rm calculators on deadlifts and bench, and lower on squats. So the lowest 1 rep max calculator estimated my max to be 425, the highest around 455. When I deadlifted 335x1 my max 5 repper was like 275, so 82% of max. I also searched a bunch of stuff on guys with similar stuff like me, ie guys who deadlifted 315x15 and 375-380x5. They all had maxes of 430-455, so that is what I am hoping for
damn I think I could pull 275 for double reps and I doubt I could pull 335!