Have Gimballed cannon (lock) been nerfed since 1.3?

[GunnerBill]

Agreed, shotgun may not have been the best comparison but ballistic speed of a cannon is a lot lower than a sniper rifle, therefore a maneuvering target at distance will be very difficult to hit

From wiki -

M82 Barret sniper 853 m/s
30 mm bushmaster chain gun 1080 m/s
105 mm howitzer 494 m/s

The last two are from the awesome C130 Spectre gunship.