IMR 4350 powder would be the primary option for The brand new quick magnums, both Remington and Winchester versions. For magnums with mild to medium bullet weights, IMR 4350 is your best option.Hodgdon IMR 4350 is a smokeless, medium to slow burn magnum, great for light to medium bullet weights get more info and the new brief magnums from Remingtonā€¦ Read More