With my 8 lb jug getting lighter, I will need an eventual replacement powder for the 450/400 3". Norma 203b is also unobtainium as an equivalent these days so what other powders are good to work with for a regulating load with a foam rod filler? I hear 3031 mentioned but it is a good bit faster that RE15. In the past I have found Varget to be close to equivalent in cartridges as diverse as the 35 Whelen and .223 Rem. I also have a couple pounds on hand. Has anyone worked with Varget as a RE15 replacement in the double rifle sense?