Whoaa LOL!!!! No need to get all personal "Glenny"...
but there's a chance that by looking at our physiques, I might instinctively know more than you about what it takes to gain mass; since I've known you, you went from DOGGCRAP to some other pink dumbell or kettel bell shit in a matter of days and to be honest, haven't really grown since I've met you... and I don't have better genetics...
Now back on how to stimulate optimal growth in muscle mass ...
If you can bench press 315 for 8 reps (you can't but let's assume), we know it takes 315 to cause your muscles to fail. When you fail and can not do anymore reps, all the muscle fibers in the chest have been recruited and worked. Your warm up should of course be much lighter but technically, your first real set for optimal mass is your maximum weight in the 6-12 reps range. Do you really think you would still grow by doing 8 reps with 225 when you could do (hypothetically, we know you can't) 20+ reps? We both know 20 reps is not optimal for hypetrophy. Doesn't mean that "feeeling" the weight isn't good; but "feeling it" beyond 15 reps once again, isn't optimal.
Of course PTOR and fiber type varies from person to person, some still respond good at slightly higher reps, some at lower (usually guys with more 2b satellite cells).
No offense alex, but if i wanted to know how to be 240lbs with 25%+ bodyfat, id seek out your advice. But im pretty happy with the progress that im making at the moment.
Now onto training for hypertrophy.
There are more than one way to skin a cat alex.
I wont go into detail because i dont have the time.
But here are some ways to make some progress in your training, without lifting heavier weights. ( because your "physique" has been getting progressively worse over the years )
1. Increase training density
2. Increase volume
3. Use more "intensity" methods.
4. Increase time under tension
5. Produce more tension in the targeted muscle group.
Try some of these methods and u might actually make some improvements in the gym. And none of them have to do with lifting heavier weights. Also improve your form, no one cares what u lift, its what u look like that matters.
Lastly, just to disprove your theory. Look how Tom platz trained, rarely did u see him do low reps for squats. But what he did do was plenty of 20+ reps of squats with alot of weight on his back . So tell me if someone squatted 225 for 20 reps his legs would be a good size. but if someone squatted 225 for 50 reps i bet his legs would be a whole lot bigger, wouldnt they? Or does that not stimulate muscle fibers?