Rope for gybe preventer on 30ft boat
I have a gybe preventer I've been using on 25ft boats, a 50ft length of about 400lb breaking strain rope with a 400lb-rated snap shackle on the end. I can't remember the exact type of rope I bought but it's quite stretchy.
At the time I bought it, I thought stretchy would be a good thing. But now I think it means that, if it were to snap, there would be tremendous recoil.
So I have two questions :
What breaking strain would be ideal for a 30ft boat? and
What type of rope would be ideal?