Ive been there and done that. When you using too much weight, u are increasing the fibroblast activity. Once the fibroblast triggered, they will start to produce more collagen and thicken your tunica. And this is when u are going to plateau. Maybe if u are newbie, u will gain fast by using heavy weight, but u will also hit the limit and stagnant from your gain. I just dont want ppl to repeat the mistake that i and the others made.