Schmedium fill

Has anyone taken the heavy sand fill out of a Wiebad MFC or Puppy and put it in a Armageddon Gear Schmedium?

Wondering if it's comparable to a MFC/Puppy in how it forms to the rifle and prop?
You can get the heavy sand fill replacement directly from AG. Email them and ask politely. I actually bought one from a retailer with the heavy fill accidentally as they didn't specify so when I emailed AG telling them it didn't work for me they sent me the standard flll free of charge. YMMV.
 
I played with "white play / craft sand" whatever that is, (I can get the specifics on it if needed) in my MFC for a bit but ended up dumping it and going back to the polly beads in it for weight. I tend to prefer the size/shape/weight of the Schmedium after I took a cup or two of the AG sand (whatever secret squirrel blend it is) out of it.
I thought about dumping my TaterTot bog and filling it with polly beads (again, size vs. weight) but haven't yet. I generally default to grabbing my Schmedium bag.
The thought has never occur to me to swap fill from one bag to another.
 
I like the weight, the heavier and denser the better. I just wanted to try the sand out of my MFC in a Schmedium. I tried it and I didn't make much of a difference compared to the heavy fill that comes in the Schmedium.