This whole ‘setting the hook’ thing is fascinating to me.
Not the ‘when’ (we ‘know’ objectively when it should be done) but what eveyone ‘thinks’ is the best time.
There is a ‘time’, though, when a bass has the bait in the mouth when you CAN’T set the hook.
It’s when the bass ‘crushes’ the bait. If, for some reason, your hooksetting force arives at that pricise instant, the hook won’t set.
You can ‘prove’ this to yourself with a simple test.
Use which ever rod weight you want.
Stretch out 20 to 30 feet of line, with leader/tippet/fly attached.
Now, you need another person. Have that person hold the hook of the fly by the bend between their thumb and forefinger, and extend their arm straight toward you. Tell them to hold tight.
Try to ‘set’ the hook. The results will amaze you. You’d think that the hook would pull free, but it won’t.
You can’t do it, even with heavy casting gear unless you go to one of those no stretch super ‘braided’ lines.
The flex of the rod and the stretch of the line/leader/tippet disipate the application of force.
So, if the bass has the fly ‘held’ between his crushing plates, the hook can’t move and it won’t ‘set’ unless it moves…
This explains some of those times when you feel the fish, set hard, have it on for a few seconds, and then it comes unbuttoned on you.
For the guys who’ve ever felt the distinctive ‘tap-tap’ while fishing with a plasic worm or jig, the first ‘tap’ is the fish engulfing the lure, the second is the fish ‘crushing’ it.
As far as when to ‘set’ the hook on a bass. Do it as soon as you feel the fish. Don’t ‘hurry’, but don’t ‘wait’ either. Faster is better than slower.
If you are fishing a lure or fly that the fish will hold (bass are agressive, they intended to eat it, and absent a serious reason why they shouldn’t they will swallow it) setting quickly reduces deep hooking and killing fish.
If the fish isn’t likely to hold your fly for some reason, then there is never going to be a better time than ‘right away’ to hook it. The WHOLE thing is in the bass’ mouth the fist time it ‘touches’ it. It will never be ‘more inside’ the fish, but it can be expelled. All waiting does is give the fish longer to get rid of your fly.
Good Luck!
Buddy