How deep do you all get a 5xd,6xd,8xd, and 10xd?

A long rod will always increase casting distance on any lure. I like to use a rod between 7.5'-8' long for deep diving crankbaits since accurate casts which are much easier achieved with shorter rods are usually not needed when throwing a deep diving crankbait. Aside from using thin diameter and dense line like the 10-12lb fluorocarbon you are using I recommend using a baitcasting reel which has a wider spool for longer length casts. Also casting with the wind at your back will help increase your casting distance in addition to turning off as many of the centrifugal brakes on your reel as possible without backlashing too often so that it does not slow the line leaving your spool nearly as much during your casts. With loosened centrifugal brakes you will backlash much less often by simply letting the rod do the work rather than casting as hard as possible which will more often result in a backlash. In addition it is very important to make sure to have your crankbait properly tuned to be running as straight as possible on a quick retrieve to help achieve the maximum diving depth from them and keep your rod tip down towards the water, especially at the beginning of your retrieve. After catching a fish or two you may have to adjust your line tie to ensure your deep crankbaits are running in a straight line. I hope this helps, good luck!

You can get a 6XD down way past 20' Strolling if you use 10# fluorocarbon and let out 100-150 yards of line. The fluorocarbon pulls the bait down deeper. Keith Combs showed everyone that when he won the TTBC on Fork with 110# for 15 fish in three days. He said he could get an 8XD down to 45 feet on Fluoro strollin.

I think the majority of it has already been addressed, but I'll chime in my two cents on tuning the crank bait. To me, IMO, that is the most important factor in ANY crank bait, not just deep cranking. To add some info. While it helps, it's not a given that if you spend more money on the crank bait, it will run true. I've had some Megabass cranks that didn't and some cheapo Academy brands that did, so it is another "it depends" thing. On the tuning part, here is one video by Tactical Bassin' that addresses tuning. There are tons more out there..............


https://www.youtube.com/watch?v=nMsCtJA6YYs

Long casts

You can get a 6XD down way past 20' Strolling if you use 10# fluorocarbon and let out 100-150 yards of line. The fluorocarbon pulls the bait down deeper. Keith Combs showed everyone that when he won the TTBC on Fork with 110# for 15 fish in three days. He said he could get an 8XD down to 45 feet on Fluoro strollin.