Many times juice can increase you muscle strength faster than your tendon strength. I know it sounds very bro science but guys have added 100lbs in the bench in 6 weeks of juicing.
Lower the weight and do slow cadence lifting. Three seconds up and three seconds down. It will lower the weight but is safer than the normal bodybuilding rep cadence. If you can lift as much as you wrote you're incredibly strong. Regarding Heath is there a video of him doing 40 reps in the bench. Find that hard to believe.
I totally believe Heath can hit upward of 40 reps with 225. I'm drug-free and could
approximate (not 40, so don't get your knickers in a knot) such a feat.
Regardless, to suggest Phil could "easily" press 5-550 is pure ignorance. The author of this idiotic statement is probably one of those guys who believe Arnold could bench 500 in his heyday.
P.S. There's nothing "bro science" about the statement that, with steroid use, muscles strengthen, but tendons, etc. do not (from the excess hormones). It's ABSOLUTELY why a majority of major injuries in weight training happen to lifters who are using.