I just happened to notice that I had class 2 and 4 transport turrets. The T4 turrets have 1500 m/s speed, and the T2 turrets have 600 m/s speed and I found myself having difficulty hitting anything. That's why I made this post. Lol.
One way to solve this problem is sort different speed weapons into different weapons groups.
For example, your 650ms Debs go into one group, and your 600 ms hull busters go into a different group. As long as the weapons are in their own weapons groups, the aiming reticule will be correct.