Buy IMR Enduron 4955 Smokeless Gun Powder 1lb online. E.I. DuPont established the business of manufacturing IMR powders more than two centuries ago. The IMR series of powder is suitable with a variety of reloading applications and is relied upon by reloaders all over the globe. The key properties of the Enduron series are elimination of copper fouling, temperature insensitivity, appropriate loading density, and environmental friendliness.Regardless of the weather or the size of your objective, IMR 4955 will help you in attaining success. It may be put into cartridges for the.25-06,.270 Winchester,.280 Remington, and.300 Winchester Magnum, since its burn rate lies between IMR 4451 and IMR 7977. When Mother Nature fails, IMR 4955 with Enduron may be counted upon.