Im assuming you've edited the penetration textasset file as well - there is a flip in numbers for the 15 inch (380mm) resulting in penetration wierdness between 225 and 175hm
15,15,938,914,825,720,570,627,487,434,365,319,261,12,27,41,49,69,111,177,193,209,,,,,,,,,,,,,,,,,,,,
Should be:
15,15,938,914,825,720,627,570,487,434,365,319,261,12,27,41,49,69,111,177,193,209,,,,,,,,,,,,,,,,,,,,
Edit:
Just to add instead of new post...
1.5.1.1. is basically overriding / nullifying all accuracy work done by Barao - every gun from 12500m down to "touch the other guys hull w the tip of your gun"-distance is 10-11% hit chance..for now
Yes, its a game thing, i've tried 10.9.1 and 10.9.2 in 1.5.1.0 where they work fine.
1.5.1.1 overrides NAR and gives you the above 10-11% whereas 1.5.1.0. does what NAR was intended to do etcetc