This is .270 Weatherby Mag. 130gr. Barnes Triple Shock Hollow Point Ammo. This is a turbo-charged version of the popular .270 Win. In 1945, Roy Weatherby shortened the .300 H&H Magnum, blew out the body, necked it down to accept a .270 bullet and gave hunters a flatter shooting, harder hitting .270. Ideal for long-range, medium size game. This X bullet is an all copper hollow point. Weatherby uses only the finest components, such as Norma brass, to assure that each load is as precise as a shooter's favorite handload. Premium ammunition for premium performance. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases. This ammo comes packed in 20rd. boxes.