How much does a magnum fluke weigh? Should I throw on the setup I throw for jerkbaits and flukes (a 6 foot 6 medium, 7:4:1 Gear ratio reel)

A little over 5/8 oz.

   Fluke alone is .776 ounces. Add a 7/0 hook and it comes to .851 ounces.  With what it takes to set that hook, I wouldn't throw it on a medium for sure.    jj

Over an ounce I believe. I’ll check for ya. No you shouldn’t use M rod especially jerkbait rod. If wrong snap cast your 1pc rod would become 2 pieces.

Added****
I think @jimmyjoeis right. I thought he was talking about Fluke.

The magnum fluke weight about 19 grams with hook 22 grams (.67-.77oz)

P.S. I weighted old fluke that has been fish.