While barrel swivels may work fine for the bottomfishing crowd, if you want your swivels to twist under load or while trolling, you need to use a ball-bearing swivel, like the solid-brass ball-bearing ...
Slab crappies are meat eaters—sure enough minnow munchers. They take artificials well at times, especially jigs—but big crappie will turn their noses at even the best of the best crappie lures.