The Quick Change High Capacity Drop Tubes, when used with other accessories, lets reloaders preset to their favorite large capacity rifle charges, such as 110 grains for their 30-378 Weatherby or 120 grains for the 600 Nitro Express. The High Capacity Drop Tubes, in conjunction with the Quick Change Drop Tube Adaptor, allow the use of these on existing Uniflow™ or Quick Change powder measures. Note: The Powder Measure should be used in conjunction with an accurate powder scale for setting the original charge and for checking charges occasionally during the run.