I have an 09 Argentine also chambered and stamped for 30-06 and it shoots ok with factory ammo. I tried lead 30cal bullets but after I slugged and got .313, I swapped to the Lyman 314299 200gr duplicate of the 311299. It shoots much tighter groups than ever before and I am still working on a "perfect" load for it. I have no problem chambering bullets sized to .314 and I can slide a bullet into the neck of a fired casing with light resistance.