Some possible errors

[Imp]

Not saying how to suck eggs you probably do this & as programers far better than me just running macros.
Imported all weapons into one database & got to sort by name & weapon class then it compared fields & highlight diffrences.
There are a lot in weapon size but ignoring those as think not used first 3 weapons gave errors as follows

ID 15 Australia Slot 83 Name.30 (2) BMGHE Kill 7
ID 48 Brazil Slot 69 Name .30 (2) BMG HE Kill 8
Only 2 entries for this weapon

ID 28 Netherlands Slot 51 Name .30 Browng AAMG HE Kill 9 Accuracy 15
others all have 5 & 20 lots of entries

Assume without looking these are vehicle weapons as 2 sets of ranges 10 & 24 so ignoring.

As I said thats first 2 weapons with more than 1 entry could post more but probably easier if you set up to run yourself
The sheer amount of data errors are bound to creep in
Cheers
John