I was thinking about building a fast twist 22 to shoot the 90 grainers. I have had great sucess with the 6x47 and 6.5x47 so the idea peaked my interest. I guess it would be similar to the 22/243 with just a tad less capacity, but I would get to use small primers which I like. Anybody tried it? Who makes the best fast twist .22 barrels? Should I just go another direction like a 22BR or 22PPC or even straight 220 Russian? Can anyone talk me out of having more rifles built?