Unpopular opinion. Heavy one hand swings are no good. I can feel my SI joint popping out of place reading your post. What's the payoff? I'd rather snatch instead. Hand 2 Hand swings are a circus trick. Do you want to do swings or play catch the kettlebell in mid air? So many things can go wrong including breaking fingers. (Yes I broke my ring finger 14 years ago doing it.).
As
@marlowe says, you're better off doing 200 two hand swings. I've seen a "Master RKC/StrongFirst" member do one hand swings with a 44 kg on his blog, and I thought "that bell is not even getting beyond his crotch."