You can set the wind layers per the setup for this week's frame and practice your run using manual calibration offline. All the squad COs and XOs got the setup over last weekend. Everything that the game is capable of doing is available offline, you just have to set it all up for yourself.
Tip: Turn on the dive bomb sight for practice. It works whenever you have bombs or rockets loaded. It'll show where your bombs will hit regardless of your calibration. (Calibration does NOT compensate for wind layers--it's a ground speed/drop alt thing.) Look for a little green cross under your plane. It'll actually show on the floor of your plane if you look down. You'll be able to see how far to one side or the other you have to aim to get hits. It's a great tool for getting the hang of manual calibration. The dive bomb sight won't be available to you online, of course.
Good luck,
Drano