Hi, I'm well-versed in firearms and shooting (former jarhead), except at the longer ranges and the newer calibers. .308 is where my experience stops as far as anything that will go a good bit of distance, but have been reading about 6.5 Creedmoor, and now 6mm Creedmoor, .260 Remington, etc, etc. I'm looking to get something that will reach out and touch something. Not for competition, but for the Zombie Apocalypse scenario. Looking at the Tikka T3 Tactical (had a T3 and stupidly sold it awhile back). Anyway, I'm torn between sticking with .308, of which i've got an old Savage Model 99 and soon with have the Desert Tech MDR, and therefore have some ammo stocked up. But, intrigued about all these other newish calibers. Would appreciate any thoughts and advice from ya'll. Thanks much.