It could even be a 1-16. I've got a Savage 222 with a 1-16 barrel, and some of the Sakos had them, too.
Mine won't stabilize anything very long (typically 45gr tops) worth a plug nickel, but it does shoot the Barnes 30 grainers over CFE BLK well. The downside is they're about as areodynamic as a cinder block, so they drop like a rock past about 125 yards.
