Hey Scratcher!
I have noticed, and maybe it’s just me, that the flouro seems to break easier after it’s been stretched.
That’s a correct assumption. Some will say that Flouro doesn’t stretch as much as Mono, but it stretches just as much, it just stretches much closer to it’s break strength, where mono will begin to stretch through a pull test. So, once you’ve pulled on it, it will be much more likely to break. Also, since Flouro is much less forgiving as Mono, it doesn’t doesn’t resist shock as well, another reason why it would seem to break easier after pushing the strength of the line.