We stock a variety of the MEC powder bushings. Each bushing holds a unique volume enabling you to adjust the powder load for your rounds. It is always recommended to use a scale to check powder weights for accuracy. We offer individual bushings in #7 thru #13 and #16 thru #38. Please refer to the MEC website for powder charts that will give you a recommended bushing and start point for your specific powder at www.mecreloaders.com Mfg: Mec Reloading