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Use medium heavy rods with a little more backbone.
I've had this exact issue with walleye and jaw jackers. I've used them for years for walleyesA few suggestions. Has stated above a longer rod with a little stiffer backbone helps. When the jawjacker goes off you want it to have some oomph in setting the hook because of the makeup of their mouth. As long as your rods are fiberglass, you can really adjust the settings on your JawJacker for Max angle up and max angle in so your rod is really loaded. I wouldn't do this with a graphite or carbon rod.I would actually upsize your hook. I use number eight for trout which is a small hook, and I find sometimes a small hooks don't work as well with walleye. I would go number six for walleye. Not too big but just a little bigger.The other thing I've been working on is I feel like the walleyes need to get the bait in their mouth more than other fish. I've been trying to figure out how to delay where they can take a little line before the rod goes off so the bait is a little deeper in their mouth.
I fish perch, and my hookup percentage is so low I am switching to a non- hook setter. I seem to get hooked up for about 3 seconds, but by the time I get there they are gone. I catch more letting the bait down on the drop, or letting the bait back down after a miss and holding the rod. I know others do well with Jackers, but not me. I get almost 100% hookups with the non- hook setting type- foolers or I-Fish pro. Open to any and all suggestions.
Walleye don't really have boney mouths, that shouldn't be an issue if you are also doing good on pike or other fish. Expensive rods are not needed, if anything it seems the cheaper rods are usually the ones better suited for this job. By better I mean stronger, and with a slower action. A lot of higher priced rods are fast action, lighter power, more about sensitivity and jigging. You want the opposite of that for an auto hookset. I would still like to know what you are using bait, and how you are hooking that bait.
I run medium rods, max tension on the jawjacker, and 10 lb braid with various size jigs for trout, perch, walleye, and burbot. The biggest game changer for me with missed strikes was allowing them to have some room to take the jig before the jacker goes off. I put a snap swivel (opened) attached to the bobber and 9/10 it falls off and doesn’t effect the rod upon the jacker going off. Bobber size varies dependent on size of fish I’m targeting. Changed my missed hook sets for fish drastically.