I Hear This A Lot...
DOGMAN, all I can tell you is install the spacer in your Mag, fight my Buffer into place

, and start pounding the rounds through it.
I absolutely promise you that you won't be disappointed.
The real "technical" difference between BufferTech's product (and the others that use "stiff" polymers" and mine is how the bolt recoil energy is absorbed, and where that energy gets dumped. A stiff polymer will place most of the stress on the actual Bolt-Stop Pin holes, and you'll notice the marks on that section of the buffer after relatively few rounds. The bolt makes a nice indentation on it as well.
My Buffer, being as flexible as it is, distributes the recoil energy into the spacer, and across the entire rear wall of the receiver; NOT just the holes.
The spacer is there to keep the geometry between the Bolt and the Buffer itself correct, and further absorb the bolt's kinetic energy.
In my opinion, the ONLY other buffer that should be used in a 10/22 Magnum is the Steel-Core design.
I was fortunate enough to find a virtually indestructible material with a shear modulus that's nearly off the scale for my Buffers, and they'll do dual duty; LR or Magnum.
Let me know how it goes! Good, bad or ugly, I appreciate the feedback!
Thanks & Take Care! - Dakotan