Yo Kilsong,
The reason I no longer follow the 25% rule is two fold. First, almost all of the lines out today are thicker in diameter for their given line ratings. This means they actually break at numbers much higher than their noted rating strength. In 40# for example, my Momoi breaks at closer to 50 pounds than it does to 40#'s. 80# lines are breaking at well over 90. Except for the true rated lines, which are few in number and can be distinguished by their thinner diameters, this thicker diameter will apply to most brands.
The second and most important reason is I find too many folks being on their fish way way too long. This comes from a variety of reasons that include too light of gear, their bodies maybe not being in the best fishing shape, unable to put a ton of pressure on a fish, Gear not in proper condition and finally fishing too light a drag.
If a fisherman's gear is kept in tip top shape, that is things such as no nicks in guides or line, proper connections and drags that are silky smooth, there is no reason to be on a fish as long as the overwhelming majority of folks are on them. The ability to know all the above is correct enables this fisherman to put maximum pressure on a fish and therefore bring that same fish in at a fraction of the time of most folks. This is a lesson more folks should learn as it will enable them to catch more fish in the same amount of time. This also improves the odds of getting the bigger fish. There is also an argument that fish on for less time are better eating as they are less stressed and it is also known these same fish have a better chance of living if they are released.
I defy anyone to break 80# test line while on a smooth dragged reel at 24#'s of drag (30%) or 40# at 12 #'s of drag, with proper connections. Not going to happen. The same applies at most any line test until you get to the real light stuff. Again, knowing you have smooth drags and proper connections and gear will be the insurance factor.
On most of these sites we have discussed connections, spectra, reels, hooks and other assorted gear. Very rarely do we discuss what to do once we are hooked up. There are some folks who can discuss bringing in a cow sized tuna in under 15 minutes but it seems no body discusses how this is possible. Again, I refer to my above statements as to why it can be done without relying on luck.
For those looking to improve their performance on the boat, try pulling harder with shorter strokes, at the right time, and learn how to keep a fishes nose pointed at the boat for the maximum time possible. Rail rodders especially know what can be done with this new found leverage. With the advent of smaller two speed reels look how to use that new found power of the lower gear. This will not be done with lighter drag settings.
If the fisherman has not learned proper connections or their gear is not in the best of conditions then by all means go with lighter drag settings. The reason these boards are here is to improve those fishermen who desire to take the time to improve. Once all the above is in place then pulling hard on the fish, with the right drag settings is the next way to improve that performance.
One other thing to note, depending on the cam in the lever type reels, if the strike is set too low, especially on the higher rated lines, the fisherman is not getting enough at full. This may not apply to the latest gear but most of the older gear that have not been after market tuned and hot rodded folks are using, this will apply to.
The last point is with these new wonderful reels we are having to work the drag lever less and less or not at all.
This is again an advantage as the second or two spent adjusting the drag lever is all a fish needs to turn its head again lengthening the time of the fight. Most of us know the longer the fight the more chance of something wrong happening.
JMHO.
Jamie