IF you would like something a little exotic you could go with the 6.5X64 Brenneke which is a 270 necked down to .264 with no other changes or try the 280 Ackley improved. The 6.5X64 is standardized in Europe and ammo is available in the USA. The 280 Ackley is made by fire forming 280 Remington in the Ackley chambered rifle. There are places such as conley precision that offer ammo ready for the two above mentioned. Although, if you just go with the 280 you will probably be just as happy. Federal has just introduced some new loads for the 280 and winchester offfers 2 very good ones.