Could be. I didn't pursue it enough to find the price, though.
Other than the specific issue of Mil Dots, the Sierra reloader's handbooks have a tremendous amount of information about zeroing scopes, trajectories of different bullets at varying velocities, windage, uphill/downhill and other useful information about shooting--at least to 600 yards, anyway. They are the most complete I've seen. Portable, too; no batteries needed.
Agreed, but the price is $35, and it seems like a good way to practice the calculations when you're at home. I tried the "test drive" version, and cheated with my no-batteries Mil-Dot master and did fine. You're right about the Sierra books, I've been using that for a while, too. The Mil-Dot master is much more portable, though.
After running through the "trial" version a while back (I used my Mil-Dot Master too.) I almost considered plunking down the 35 bucks for the full copy, but I backed out. I was kind of hoping somebody else would be the guinea pig and tell me all about it.