I would not fish with such jigs, I mean jigs where the eye (tie ring) is not perfectly closed. I bought a bunch of EC rotating hooks, and had to take them back because all the eyes had a gap. I got some jigs on close-out at a well known retailer - same thing - had to throw them in the "never use" pile. Maybe one day I'll need to recover the lead from them.
One lake I like to fish, you are as likely to get bit by very large bass as often as the panfish I'm after. I hate to lose anything, so I use a Palomar knot. I never use the loop knot unless vertically jigging crappie off a brushpile or bridge column, or long-lining. The loop will break way before the line from tension.
"Alive without breath, as cold as death; never thirsty, ever drinking, all in mail never clinking."