The bait you're throwing on a C-rig has a lot to do with casting distance. A fluke style bait will cast much further than something like a full size brush hog. I would play with different baits before I started messing with the entire setup.

What action and length rod are you guys throwing the heavy rigs on? I know you want a high ratio reel to take up line faster.

Most time I'm using dobyns 784, I have used 804 but it's a beast and I dont like it for long days.

Pegging a Carolina Rig defeats one of the features of the rig. Another post was dead on when he said "cast the weight, not the hook." A Carolina Rig is best cast as a "lob" more than a "whip action" cast such as you might do with a traditional rigged lure. You do NOT forward load the rod by executing a fast backhand. You should "[censored] the catapult" for the cast with a long even speed backswing, in a side-arm movement. This will give you more room to accelerate the rig when you reverse direction. It also helps keep the weight pinned against the swivel.

The forward cast should be a long sweep, getting faster as the sweep progresses, until you release spool pressure to let 'er rip. This procedure is exactly how heavy swimbaits are cast. The premise is you don't have to "whoosh" a lot of air when you're casting what's somewhat like a miniature brick.

P. S.: If you notice your rod tip whipping back an forth rapidly at the point the lure is released, you are casting too fast. The rod should load and unload smoothly.

Good stuff guys, I will do some experimenting. I think I have a 5/16 oz weight on and need to upsize. Thanks

I’m having trouble getting any distance with my rig. Is It the 2 weights at the end that are working against each other and cutting distance?

Cast the weights, not the hook.