Hey guys...looking for some advice when it comes to deadlifting. I know 1rm calculators are just estimates, but there seems to be a large discrepancy between weights I can rep and my actual max. The other day I set a PR of 351 for 8 reps...calculator says I should be well above 400 lbs, but I can't seem to break my PR of 391. Any advice on why there is a discrepancy? I can squat 326 regulation and bench 240 regulation.