Re: AICS short action magazines - .308 and .223
Andy
I would expect that the .308 AI mags would not work very well, if at all, with .223 size cartriges, although I have not tried it myself.
What I can tell you is that the .223 specific AI mags in Stiller bottom metal on a Rem 700 work flawlessly. The slick polymer mags insert, feed and drop free without a hitch. The only beef I had was that they are light enough that I felt the need to add about 1 oz of stick-on wheel weights to the bottom outside of each mag to make the "drop free" a little more positive.
At the time I was buying, only AI was offering .223 specific mags, don't know if there are any alternatives out there yet, but the .223 polymer mags are a fair amount less expensive that the AI steel mags for the other calibers, so there is a plus there.
Paul