Go to Hogdon and check the Max and Min load data for both kinds. You will see they are exactly the same. You can get more sc into a case due to load density. Don't worry about the differences unless you are into compressed load density territory.
H4831SC - Ballistically, this Extreme Extruded powder is the exact copy of H4831. Physically, it has a shorter grain size, therefore, the designation SC or short cut. The shorter, more compact kernels allow the powder to flow through the powder measures more smoothly, helping to alleviate the constant cutting of granules. With the smoother flow characteristics comes more uniform charge weights, while the individual grains orient more compactly, creating better loading density.
I am using Petersen srp brass. I will get back to you eventually on the jump and reamer specs, but it was initially more then I was thinking it should be, but it shot so good I left it. I am sure the lands are moved forward. It shoots so great that I hate to re-measure.