I got a Tactical 20 a couple of years before even hearing about the .204
Ruger. The two are so ballistically close, they may as well be twins. Had
the .204 Ruger been available when I got the Tac 20, it would have been
a very hard choice between the two. However, like the .17 Rem, the Tac
20 is based on the .223 cartridge. Since it is still (and probably always will
be) a wildcat cartridge, I MUST be a reloader. The upside of the .17 Rem
and Tac 20, is that the .223 will probably never be discontinued, and brass
for sizing down will always be available. It's doubtful that the .204 Ruger
will ever be discontinued, but if so, from where will you get the brass?
There isn't much .222 RemMag brass out there. There are ka-zillions of
.223 brass out there right now, if the .223 were discontinued tomorrow!