I have the drag on my heavy cover rod set to about 9 lbs. Not enough to break the rod, reel, or line. I've opened hooks on jigs. I think it's simply the initial shock from a slack line hook set - you know the one, you see the line jiggle, and whack it. It's isn't a ton of pressure, either. Not enough to pull drag. Stepping up to a jig with an Owner 3X hook will go a long way.

Oldham's Eye Max jig 5\0 Siwash Salmon Hook