Thats why I don't mess around this time of the year. Mostly fish 40lb main line when using cheaper less flexible rods and flashers and 30 with good rods and always 50 lb leader on hootchies and chovies. The 33 we got a few days back ran very hard and fast. Lost a monster on 30 pound leader 3 years ago and then switched to 50 lb leader and have not had a leader break off since. Did have a friend break one off on 30lb mainline.
Salmon are not leader shy and I don't want to loose that very rare, near impossible Sooke Chinook of a lifetime (45 to 55 lbs) if we finally luck into one because we are using 30 lb leader. Also when you luck into a good Hali while salmon fishing or are fighting a seal for possession of your tyee you won't be unhappy that you have heavy leader.
It is also extra insurance hauling in kelp as we sometimes like to fish in the weeds because sometimes the fish are under them and fishing in the crowds we fish in you sometimes have to play fish tighter than you would like or would do in less crowded places and if you have someone inexperienced who tend to play fish too tight and clamps the reel, they break off less.