You can buy a genuine log book for either Bench rest, NRA across the course shooting, or long range target from Sinclair International.
You can also buy a genuine DCRA log book form Paul Reibin at Rangesports Unlimited or off the DCRA site.
These are very useful for competion shooting at the vatious distances needed.
I use the same as LRC however, becuase I shoot so many different rifles and and handload for many different people.
I don't always need to plot a group on a target, but can transpose it onto the sheet or simply cut the group out and stick it in there.
I also record all the other little stuff that goes into the mix, such as when I cleaned the rifles, round count, what I saw on the day going to the range etc.
(VERY important for scouting forays!

)
I quit using an official log book quite a few years ago because I found that a standard note book actually was a better rig for me.
Those two sources can be of help if you need an official one, however.....
Cat