Well, no guarantees, but hopefully the baro will help. It doesn't really prevent over-firing on most stoves, because with enough air coming through the inlet many can be made to burn too hot even with the baro. What the baro does is limit draft to the manufacturer's recommendations, which according to the Reading manual for your stove is .04 to .06. With too much draft the hot combustion gases can be sucked out of the stove and up the chimney without giving up their heat to the body of the stove. At the very least you wind up using a lot more coal for the same heat output.
As North Candlewood recommended, ideally you would also use a manometer to set the baro accurately. However, if installed plumb and level you can get a reasonable setting with the sliding weight scale -- I'd recommend starting with the higher .06 setting, see if it burns well, and maybe reduce it towards .04 and see how it does.
Good luck, and post results if you can.