DakotaDeer: You and Mark are on the right track - the 204 Ruger in fact is FAR SUPERIOR to both the 17 Remington and the 223 Remington for MOST ALL Varmint applications!
In fact the 204 Ruger is so far superior to those two that they are not even on the same page!
BUT that was not the question of the original post.
I join both you and Mark in praising the 204 Ruger!
But Eurosport was wondering which cartridge had the furthest lethal range on Coyotes and Prairie Dogs.
I gave my experience and opinion to my limited degree of observation.
Yeah, the 204 WILL outperform, lethality wise, both the 17 Remington and the 223 Remington on Varmints at all ranges that 99% of all Varmints are taken at.
No "potential" involved - its real - its fact!
Hold into the wind
VarmintGuy