A friend is looking for a reamer for what he called a .20
Hornet. I told him that I thought it was called .20 Squirrel.
Anyone know about this? If I'm right, then is the .20
Squirrel based on the Hornet, or the K-Hornet? Does anyone
know where he could get a chamber reamer?

Neither of the shops I rent reamers from have much in the way of 20 caliber reamers. I would suggest posting a request on the group

http://www.saubier.com/forum.html

and see if they can help you out. I know there are folks there that have had 20 Hornets built. A 20 Squirrel is based on a shortened hornet case.

Here

www.clymertool.com