Hi motivatio,
I've had 2 Coopers in 17M4, so I know what a great cartridge that is. I never liked the M21 because the action is too long for the 223 family (IMO).
I just found out that Cooper now offers the 223's in their smaller M38. Everybody else has probably known that for a long time
SOOOO now I'm lookin' to get a M38 in 20 Vartarg.
Thanks
BM