Dugbet I have never seen it done ever.
https://www.professionalmuscle.com/...t-too-much-protein.165144/page-5#post-2850994
"I have yet in my lifetime seen a beginning lifter lets say around a starting point of 160lb at less than 10% bodyfat.....and staying at 10% or less all the way thru the journey...end up at 260lbs plus still at less than 10%. Never seen it done or even remotely close to being done. Cant think of one person and ive been around for a long long time who even got close to doing that. Virtually every large bodybuilder i know ate their way up to superheavyweight status"
If you can show me one example of a person who stayed sub 10% on his journey to gaining 100 plus lbs of muscle mass I would love to see it. Could it be done in theory? Yea but the guy would have to absolutely abuse himself with drugs to accomplish it and would probably take a good 30 years off his lifespan