And it doesn't.
There is only one gunset that can be used for AA with more or less succes... SD-2... and it still has 2.76 reload...
Have you even tried AAing at lvls 1-85? Or are you testing only with lvl 120 supercrew??

Blah blah blah... OP! NERFHAMMER!!!

What is so spectacular on it??
It is still KM>MN>IJN>SN~USN>RN

lets see:

KM
lvl42 5"/ 61 KM40
cost 3500
space 37
reload 1.2
damage 99
muzzle speed 900
GA 32

MN
lvl20 3.5"/50 cal model 1929
cost 2300
space 37
reload 1.56
damage 42
muzzle speed 1107
GA 25

IJN
lvl36 4.7"/ 45 Type 10
cost 2250
space 32
reload 1.84
damage 60
muzzle speed 830
GA 27

SN
lvl32 5.1"/45 SD-2
cost 6300
space 65
reload 2.76
damage 95
muzzle speed 795
GA 31

USN
lvl33 5"/ 38 cal Mark 38
cost 3200
space 46
reload 1.44
damage 81
muzzle speed 713
GA 43

RN
lvl48 5.3"/ 50 RP 10 Mark I
cost 4250
space 50
reload 2.24
damage 100
muzzle speed 713
GA 36

There is no need for reload buff... Even damage buff for Minizini is not needed as it sucks anyway...