Just about any slow pistol or shotgun powder will work with the 30 carbine. Some are better then others. Some have been around since the beginning in 1941 like 2400 and IMR 4227. The Winchester powders we all use today like H-110 are really a 50's developed powder that have their roots back during WW2 when Western Powder developed the ball powder. If your looking for which powder Varget is closest to it's not IMR 4895 or H4895. It's IMR 4064 that it's almost identical too.