I own a MH BPS Extreme 6'6", and it is what I have been throwing all of my crank baits on for a long time. Unfortunately the reel I had on it went out on me for the second time, so I don't use it that much anymore. Also I stepped up my game and bought some nicer setups and honestly hate using the BPS rod now because it is not the same. I know that it being a short rod affects my casting distance, but I also own a 7' M Duckett that I have thrown a crank bait on a few times. So from comparing these two rods is how I knew it cast further.
Just to clarify, when you say moderate action I think of the taper of the rod and the bend that it has when loading the bait. For example, a moderate action in my eyes has a more parabolic bend compared to my fast action which only loads or flexes on the last 1/3 of the rod. Now, my hypothesis is that my stiffer rod with a fast action shoots the bait faster towards my target from the loading point due to my heavier power rod wanting to get back to its original shape faster then a medium power would, even if they both had the same action. Think about it, on a heavy rod it takes more resistance to bend it from its original shape compared to a medium power rod. So, the more resistance there is the faster the velocity of the bait shooting from the loading point. I know this sounds wild, thats because it is wild. It makes sense in my head though, that is why I am giving it a try! I am not set on this theory, I am merely experimenting instead of going out and buying a new setup. If it works I can hold out for a while and save some cash.
As for the sensitivity of running a crank bait on bottom it seriously is like nothing you have ever felt while cranking before. Like I said, I have other rods and have used them for DC. The denser heavy rod does send vibrations better through it than a less dense medium rod, I can promise you that. That is one reason a heavy rod is great for pitching and flipping into cover or for slower presentations, it is easier to feel those softer bights.
Overrun is a problem I am having, and it most likely will make this idea worthless. Im going to keep messing with it though and see what the outcome is. In the end, if I had to choose, I would most definitely go out and buy a long MH power rod with just the right whip and backbone. Unfortunately, that is out of the question right now haha! College is not cheap! I definitely appreciate the input though!
Tight Lines My Friend,
TCN