I had a similar experience this summer. I've been throwing 25 lb Big Game pretty much forever and had never broken off a swimbait fish before, with the exception of a couple that sawed me off in heavy cover. I also probably retie my swimbaits more than anyone (Rob can attest to this by the amount of line clippings that pile up in his boat :)). Anyway, a couple months ago I broke off two fish on this line about an hour apart, both for no apparent reason. The first time the line broke about 10 seconds into the fight, the second time the line broke on the hookset.

Earlier in the day I'd got my bait snagged hopelessly down in some tree branches and had to break it off, and it took everything I have to pull hard enough for the line to break. (for those counting... 3 brand new hudds lost so far). There was definitely nothing wrong with the line at that point, and I wonder if stretching the line like that may have been the cause?

For now I've thrown away that spool of line and am chalking it up as a freak accident.

Nico