Anyone have any other ideas?
I made some changes to your project for the camera, see if you are happy with it:
For me looks smooth with no stutters.
All the changes made were in the Camera Group:
-I removed the Pin from the crosshair
-Bullet from the camera
And I just lerp everything
Also, I changed some settings in the Display settings
https://www.dropbox.com/s/j280quoifanaprw/camera%20help%20V2.c3p?dl=0