I don't see how you could have 1/3 the recoil of a .223 when you have all the powder of a .223 and more velocity, even if you used a 5 grain bullet, unless you are comparing guns of different weight.
recoil momentum = bullet mass x velocity + powder mass x (2 x bullet velocity)
Recoil energy = recoil momentum x recoil momentum / recoil mass
The above is based on the assumption that the powder is ejected at twice the bullet's velocity, but it seems to match up well with observed recoil, so it must be a fairly accurate assumption.
I just hope they don't limit the .204 to a 22" barrel like they did with the 22-250.
Mitch.
http://www.keepandbeararms.com/news/nl/read_comments.asp?nl=2544505124238