It depends on what percentage of his 1rm he's doing. I use 531 and it's based off a training max which is 90% of your 1rm. You never lift heavier than about 85%

It depends on what percentage of his 1rm he's doing. I use 531 and it's based off a training max which is 90% of your 1rm. You never lift heavier than about 85% of your 1rm on the program because doing so is heavily taxing on your CNS. Unless he is using PEDs he probably won't last long-term if he's lifting close to his 1rm twice a week.