You should totally be able to swim with any of the three. As
@Archer has said many times, the rating is the rating. I've gone in the pool many times with my Speedy Pro with no issues. I know some on here find that to be a terrifying thought, but when it says 50 or 60M resistance, that's what it should be. It does remind me, though, that before I take the Pro into water again, I need to get the seals checked. But when I get my Railmaster back, with the documentation that it is back in-spec, as far as I'm concerned it should be more than fine for going in a pool or a lake. Whatever is going on with these leaking ones is not normal and is not up to snuff like it is supposed to be.
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