If you want to avoid worrying about battery life, I would strongly suggest an external USB battery pack. They sell one on their website that probably works just fine, but they can be purchased cheaper elsewhere. It's 30 bucks you won't regret spending.
Make sure you are using an SD card if you want to record all the "good stuff" that the unit is capable of recording. Only basic info is recorded without one.
Make sure you accurately set your barrel offset in the set up parameters. It can affect the accuracy of your results - read the manual for an explanation of that.
The screen saver time and the radar arm time are both set in the parameters to values you choose. I like to shoot slowly during load development but don't want to miss a shot either if the unit "de-arms" the radar before I take the next shot. Therefore, I set the arm time to 90 seconds and the screen saver time to 60 seconds. That way, when the screen shuts off, I know I have 30 seconds to get set and take the next shot.
The range I shoot at most often uses chicken wire for hanging targets on. I tried to use the unit at 10 yards with pistol loads and quickly discovered that it REALLY doesn't like chicken wire that close. (Yeah, 30 seconds of thought could have headed that one off.) It seems to be just fine at 25 yards and beyond, however.
Enjoy!
