Freshman year he was listed at 235.
While Purdue listed him at 280, as was pointed out repeatedly when Bryce was being discussed as the #1 pick, colleges are notorious for adding pounds and inches like pro wrestling. I find it really hard to believe he packed on nearly 50lbs of muscle in a single college offseason. 20 - 30? Yea, I can see that even though it isn't as common. 50 tho? That's a ridiculously massive jump in one offseason.
Plus, looking at the 2023 vs 2024 tape, there is a clear size & speed difference. Give the tape a view! You'll like what you see.