Fishing casting rod weight?

For sure MH. Why?

#1. Your mainly using Jigs, small Swimbait's, and Soft Plastic's......?

Your choice of rod action has nothing to do with the size of the fish your gonna be targeting. You choose a rod action by what weight LURE you'll mostly be using and what species of fish you'll (mostly) be targeting.

The lures you've mentioned (Jigs, Swimbaits, Soft Plastic's) ALL require a heavier rod. WHY? A "small" Swimbait can range in weight from 3/8-3/4 OZ; most people throw 3/8-1/2 OZ Jigs; most of the time any Soft Plastic Worm or Creature/Craw will weigh in around 3/8-1/2 OZ after you've rigged it Texas, Wacky or Carolina....Etc.

SO, it's partially the weight allowance specs for the rod. Check the weight designation on the rod before buying.....if it states 3/8-1/2 OZ.... THOSE are the lure weights that work best for that particular rod.

#2. Back-bone- Your obviously targeting Bass.......? Jigs, Texas/Carolina rigged Soft Plastic's and Swimbait's ALL require (at least) a MH rod action. Why?

A stiffer rod action tends to (greatly) support your hook-set power- esp when using stationary lures, (like Jigs and Soft Plastic's). Trying to set a single hook into the bony mouth of a bass needs power. And most medium action rods don't have enough power to do this well......

ML rods are even worse! No power!

In Bass fishing, Medium action rods are good for lures that are in constant motion- Spinnerbait's, Crankbait's, Topwater "Walk the Dog", Etc.

Also, not sure if using 4-6LB Mono line is a sane choice for most Bass fishing......esp Jigs and (any size) Swimbait's...(very, very, VERY rarely do even the Tournament Pro's use lighter line than 6LB- and that would be while targeting Smallmouth Bass on Offshore humps).

Realize- When using (Clear or Green tinted) Fluorocarbon you can move up 2 sizes in line weight due to Fluro's invisible characteristic's. If your using 6LB Mono line, you can move up to 8-10 LB Fluro and get just as many hit's.....try it......

#3. Like Scott mentions- a MH rod "can" (in a pinch) be used with a wider array of lures and WEIGHTS- a M rod cannot........

Hope this helps?

Med-Heavy. It can do both.

I'm with Chris. I prefer medium light action for the style of fishing that you are describing. Unless there is a chance that you'll be doing any inshore saltwater fishing, that should be fine. If you think there is, a medium action will handle everything from bass to flounder.

light to medium is my suggestion, most fresh water fishing area's of heavy fishing pressure the fish are on the smaller size. 4-6 lb test line, light medium action