/facepalm
Here is a hint to finding the right number. Look at nexon weapon comparison. It says the RoF. Its generally about 5 below that number for fire rate. So 74 RoF is 69.... There are strange ones.[example: AK-74U, Nx RoF = 70 Hex = 6E] Just use some common sense and you can find the right one pretty easy.
/edit
Use the actual HEX not just the letters. Makes it easier to understand for the most part.