I'm new to long range shooting and I'm about to order a data book. Should I order a mildot master, stencil, slope doper? What do you actually use when you shoot? What do you carry with your book?
The Impact Data book all in one is a really good place to start. I use his data books in all my rifles and really like them. Reasonable on prices an really modular, although I usually just keep the blank pages in hand, they have a ton of pre made target pages to use.
I use the stencil, Mildot Master and data book regularly. Haven't had much use for the slope doper as most range finders have this feature but it is a good backup.
I love the reticle hold pages and having a dope page for each type of round you fire is great as well.
Add a good pen and a small notepad and you will be set.