Production of IMR powders dates again more than 200 yrs when the organization was originally Established by E.I DuPont. Available for use in several reloading apps, the IMR series of powder is trusted by reloaders all around the world. IMR 4227 Powder in inventory now would be the Magnum Pistol https://imr-4227-load-data72592.canariblogs.com/imr-4227-powder-43128597