And not even then.
I'm in full EWH and those numbers are so far inflated from reality that they can be nothing but the product of imagination. Even in our wildest days, we weren't putting out 5-6k grav rounds. The demo rounds sure before they got patched - but that was an eon ago. And the 6.7k Hight impact bolts? No. Not even vanguards do that.
He's living in a fantasy land. Post like his don't help when we're looking for fixes based on reality.
That might have been possible around launch, if you were 50 in full BM gear, hitting a level 10 in greens, who had multiple armor debuffs on him while they still stacked. But today, yeah, screenshots and logs or it didn't happen.