Am probably getting both AR and bolt rifle for this caliber. For the AR, 1:7 should be fine but bolt will need 1:6 for the heavier bullets. That's provided 100 or 105 gr bullets are made. They may not want to get into 243 territory but this caliber may just destroy other calibers if what's being posted about ballistics is true. Thought about going back to 6.5CM but since this came out, will be going 224 route instead. Be nice if savage would release the recon before SHOT show. My CC is standing by.