Plenty of places on the net detail the importance of and what information should be in a log book. Some also separate the "tactical" instant needs and stuff that's just data collection for future use in choosing loads etc...

Having an excel spreadsheet or something similar full of every bit of info worth keeping track of for shooting and having a separate "Tactical log", or quick reference log, that you keep with you everywhere you go shooting would be worth doing for long range target shooting.

The data log for a given shooting session would include altitude, temperature, air density, date, time, wind speed and direction, the ammunition specs, number of rounds fired for the barrel used, point of aim, point of impact, range, group sizes, round count, scope elevation needed, windage adjustments, departure angle, light direction, etc... etc... etc...

Of course, if you shoot at the same range most of the time you only have to record conditions different from usual. For example, altitude and departure angle won't change every time you go to the range.

A quick reference log would only have the information you need to make particular shots.

Am I over or under thinking this? Anything missing? Other comments?