Precise 2015 powder2015 powder is a quick burning, one-base, extruded rifle powder that performs quite well in tiny to medium varmint calibers (223 Rem, 204 Ruger). 2015 is a popular choice for first-course efficiency in benchrest calibers and is also advisable to be used in massive bore straight wall cartridges (forty five-70, 458 Acquire Mag). 2