Recommend obtaining a simple hand scale and do some testing…I broke off some fish this spring that I couldnt explain, no brush, open water, fairly light action rod, drag ok. So I did some testing, fluro to me is highly suspect. You might be surprised at the break point of some of your lines. Set up a system that gives you a good anchor point on both ends with a good knot. I trashed a bunch of lines that were “Highly recommended”. Remember this is not very scientific, but you have to have confidence in your equipment. With fluro a couple things were quickly evident, knots must be perfect, any kinks or direct connect to braid in some knots seems to “cut” the fluro. I now use the J knot (surgeons triple knot?) with braid to leader. P line is my choice for a leader. Will use up my Cabelas and Stren Fluro, the rest went in the trash. Mono, I use Trilene XL (my preference for limp, castability and test strength). I actually prefer McCoys, but kinda hard for me to get and I seem to have to re-spool more often that XL, again my choice. Silver Thread and Basspro XPS seem to be pretty good mono, jury still out. Guess the point is, dont take anyones word, do your own testing, when you set hard, you better have confidence that the line holds at the stated 12 pound test not actually breaking at 6. In the last few months , I have lost a lot of faith in line I have use for years. Back in the search mode and open to suggestions.
