I recently bought a 12FV from Cabelas for a donor action (i.e. top bolt release, centerfeed, blind mag, accutrigger). I want to build a rifle in 350 Legend and it appears that Savage does not offer a blind magazine version in this caliber. My question is does anyone know for sure if the 223 mag will feed the 350 Legend. Alternatively, if you know of a good bottom metal/mag system that is known to feed the 350 Legend, I could go that route too. I recently upgraded to AICS mags for my 308 using Accurate-Mag bottom metal, but it does not appear they have a 223/350 Legend option. Seems that in the AR you need a different mag for the 223 versus the 5.56/223.