[org.whodat]

Do you understand the logistics of changing a cartridge size ?

Yes, but it hurts like hell to get killed by the POS you have already shot a couple of times.

[Uri’el-2012]

My personal preference would have been 6.5 mm Grendel

and replace both the .223 and the .306 with the Grendal.

Also see .276 Pedersen and supplies of .30-06