The only way you can increase MV at the same pressures is to use one of the new triple based powders of the Viht 500 series, maybe in conjunction with a coated bullet. And or a longer barrel.

You won't get there safely with what we've come to consider as standard. That includes 4831SC.

Unless something has recently changed that I'm not aware of.

The high energy rounds you hear of are basically loaded with that Viht 500 series powder(sometimes in bulk to a manufacturer it will have a different name or number- much as Varget is Mulwex 5508(may not be the right number) in Australia)

Jeff