Quote Originally Posted by n4ue View Post
I did a bit of looking at case dimensions last night. It appears that the .22-204R is nothing more than a .222 Mag.

ron

Almost. A 222RM fire formed to 204R.

The 222RM's shoulder is moved forward to 30 degrees and the body taper reduced to .016", web to the top of the shoulder. The 204R is pretty much in the improved configuration as is.

I'm not sure what was changed in the improved version but in the spirit of weirdness...go for it!!

Bill