The browning solution will work just fine for any type of blueing/browning you plan to do. I use the standard browning solution cut anywhere from 1x1 to 1x8 with distilled water (in progression) when I brown damascus barrels to achieve a very fine grained controlled rust, to achieve the best pattern on the barrels.
I use a 1x2 or 1x4 dilution when blueing parts on London doubles. It all depends on how fine a grain rust you want on the parts. If you have parts with fine engraving you can not rust them too aggressively or for too long, or the engraving will be less pronounced.
For American longrifles you can use the solution full strength, or let rust for longer periods between cardings for a heavy layer of oxide. It all depends on what type of finish you are trying to achieve.
