I am most certain you will. ; )
LOL
It’s a different ecclesiology and concept of sin at the root of it. Ecclesiology in that we believe in a visible institutional Church which one can leave. Sin in the sense that one mortal sin can damn one forever—and obstinant heresy is certainly a mortal sin.
Reformed Christians just don’t think that way. First of all, the concept of “mortal sin” that makes you lose your salvation really isn’t there. And the church is invisible anyway, so you can’t really leave it by changing denominations.
Let me say one thing though. A bad Catholic is probably going to hell if they don’t shape up. If said bad Catholic left the Church, and really and truly found Jesus in a Protestant denomination, I’d have to say that person just infinitely increased his chances of getting to heaven from zero to maybe.
He could increase his odds to “most assuredly” if he just became a good Catholic, but that’s for another thread. :)