Most agree the choke wrench is for removal... and finger tight is all you need to tighten it... Personally, I use a coin to make sure I bottom it out but not to torque it down much...
You should have Mod (modified) or I.C. (improved cylinder) if I remember the Mossberg/maverick factory offering correctly... Either is just a bit of constriction... We talk in "thousandths" not hundredths or tenths... so it will not seem much as these are the less constriction than most...
Here is one chart but I suggest you research as many as possible as they differ and some charts are better than others but at this hour, this is my contribution...
Brent