I'm getting the Fenwick HMG for my Shimano Stradic 2500, and I'm going to be getting it in the 6' 6" length.

Now I fish senkos a lot and drop shots. I usually thow spinnerbaits on my baitcast but I sometimes like to throw spinnerbaits and light jigs with a spinning rod.

I've never tested the stiffness in an HMG and for those purposes should I go with the M or MH? I sometimes fish deep (15+ feet). 

I have had multiple HMG's, go with the M. 

I would go with the Medium as well.

Have a casting HMG, go with medium

I'd go MH and are there space or other reasons why you need 6'6"?   I've got the HMG 7' MH and I like the additional sensitivity that the MH has - compared to the Med.

I'm a kayak fisherman, 6' 6" is my go to length because of the confined space. 6' 6" has also worked well for me shore fishing too. 

Are HMG's a stiffer kind of rod or softer? Are they in between? Because some companies ratings are different from other rods. 

I've got quite a few HMG rods purchased over quite a few years and frankly, the powers and actions of like labeled rods very significantly.  I've never purchased a rod without inspecting it personally in-store...

 

oe