My beard is pretty thick, though it's softening with age.
Still... I use any blade I find lying around... I scrape most of what needs razing off in the shower after not having shaved for 7 days or 14 days or 21 days. Then later, after partially dressing, I find a mirror and dry shave the rest to the edge of my chin hedges. I can't dress all the way first, because white stubble goes flying like fine confetti everywhere, and I'll be dusting myself and flapping my lapels all day trying to get the "beard dandruff" off.
When I can't find one of my wife's or her daughters' leg hackers, then I will actually reach for my old double edge in the ancient bathroom medicine cabinet of our 1930s era home. No one here knew what the slot was for in the back of it till I pulled it out to show them one time. I threw all those old blades away and am proud to say all those in there now, are mine.
Sylvester Stallone said in an interview he *only* dry shaves. He likes the pain. And the blood. I'm no Stallone, but I know what he's talking about.