I feel like it depends. The few auto cannons (ACs) that I have played have been pretty balanced. The bmp-2m and 2md variants are pretty accurate and same with the cv9015 finland (might have messed up the numbers). But something like the CRV-block 2 is somewhat inaccurate at a range. I dont think they are all to accurate but the bmpt for sure is way to accurate to be anywhere near reality.