Correct 2015 powder2015 powder is a fast burning, one-base, extruded rifle powder that performs very properly in little to medium varmint calibers (223 Rem, 204 Ruger). 2015 is a popular choice for 1st-course effectiveness in benchrest calibers and can be recommended to be used in significant bore straight wall cartridges (45-70, 458 Win Mag). 201