RCBS Powder bushings are identified by numbers that correspond to the size of their inside
diameter. (For instance, the inside diameter of the #456 bushing is .456 inches.) Bushings
for powder charges in half grain increments.
Charges By Powder: DuPont SR 7625 23 Grains, Alliant Unique 22 Grains, Hodgdon HS-7 37 Grains, Hodgdon Longshot 31 Grains, Winchester 540 38 Grains, and Winchester 571 37 Grains
NOTE:All charges listed are an average of several loads weighed following the complete reloading cycle. Powders used in establishing these loads were from ballistic samples supplied by the manufacturer or sealed tins of recent manufacture. Charges may vary slightly due to operators technique and/or powder variables. Always check actual charge weight against recommended charges and adjust bushing size as necessary.