the sportsmans guide has 300 ultra mag ammo onsale stating at $19.97
http://www.sportsmansguide.com/cb/cb.asp?a=148326

19.97 is a heck of a buy. They are loaded with 200gr. Nosler Partition bullets. If I owned o 300-ultra mag, I would order is many boxes as I could.

Stay w/ the very best bullets only. If those are nosler partitions for 20$/box get all you can. Think of it this way you buy a great rifle, pay for a trigger job, float the barrel?, custom barrel?a whoop a$$ caliber, great scope, and cheap ammo? does the scope kill any animals?NO does the rifle itself kill any animals?NO how about that great barrel?NO ALL of these things simply are SUPPORT equipment for the real work horse, THE BULLET.

The bullet certainly does do the killing but unless it reaches a vital area is does not matter what bullet you use.It is the rest of the package(barrel,trigger,bedding,scope) that is responsible for delivering the bullet to the vitals.