Manufacture of IMR powders dates back about 200 yrs when the company was initially Established by E.I DuPont. Accessible for use in many reloading apps, the IMR number of powder is trustworthy by reloaders all around the world. IMR 4227 Powder in inventory now would be the Magnum Pistol Powder https://imr422749886.idblogz.com/28241780/imr-4227-powder