Greg Coker kept a MOA or better group at over 1k yards (I think it was like 1,108m?) with a 16" OBR. Others have done similarly. The gun can do it. The shooter typically, can not. That said, the 20" would be better shooting a 1k than the 16". However, if he's primarily going to be a hogslayer with the occasional long shots, anything under 600 isn't all that terribly hard with one if you have a clue (which Travclem seems to) and getting into the 800+ range with any rifle is a challenge. I've made repeated hits on a silhouette at 500m with a FN SCAR-H using crappy German ball ammo using a 3.5X TA11, and I wasn't even trying very hard. And the OBR is more accurate....... Wanna kill these ads? We can help!