Description

300 Rum Brass For Sale – Ultra Mag Brass For Sale

50 factory new Peterson Cartridge’s unprimed 300 RUM (300 Remington Ultra Magnum) brass rifle cases packaged from bulk.

All Peterson Cartridge casings in this bag have passed a 100% inspection for visual, structural and dimensional defects.  Casings are consistent in weight, perfectly annealed and finished.  A heavier case that rivals the quality of other named premium brass manufactures.

HISTORY of the ULTRA MAG.  Remington release the 300 RUM in 1999, based on the 404 Jeffries, this round has a 13% greater case capacity over the 300 WBY.  the cartridge has a preference for slower burning powders so a longer barrel better exploits the full velocity potentials.