I've been thinking about putting different barrel on my wife's .308 so she'll have something lighter recoiling to practice with. Looking at some load data, the 22 br looks like it pretty well copies the .223 AI, spits 50's out at 3500 with relatively mild doses of powder.
The only concern would be how it feed from a .308 mag, though it being a single shot wouldn't necessarily be a bad thing.
The only concern would be how it feed from a .308 mag, though it being a single shot wouldn't necessarily be a bad thing.