the 6.3 is because combat skill after 200 (cant wear torque below lv 60 anyway) is 1 skill=0.9 acc. So depending on your total combat skill it will round to either 6 or 7 acc. If you took any random combat skill total it would be 6acc 70% of the time and 7acc 30% of the time (thus 6.3 acc avg even though you cant actually have a 0.X acc)
Generally you will just want to look at your total skill and merits on the job and you can quickly figure out if your getting the 6 or 7 acc out of the torque.
the 6.3 is because combat skill after 200 (cant wear torque below lv 60 anyway) is 1 skill=0.9 acc. So depending on your total combat skill it will round to either 6 or 7 acc. If you took any random combat skill total it would be 6acc 70% of the time and 7acc 30% of the time (thus 6.3 acc avg even though you cant actually have a 0.X acc)
Generally you will just want to look at your total skill and merits on the job and you can quickly figure out if your getting the 6 or 7 acc out of the torque.