Drake,
I have a Beta. It will hold 6 strings, does SD, ES, AV, and fits in your glove box. I recall the ES, AV and individual readings of shots and write them on the side of the shot plotted target. Accurate? All I can say is I develop loads, and when finished enter the AV number into Exbal (ballistic program)and will be on paper at 1K. Additionally if the ES numbers it gives are small, I get short groups, if they are large, I get long tall groups. It works well for my application.
On the distance, I do not know what the optimum is. I set mine 10 feet from the muzzle....But I lay a sandbag on the bracket between the legs of the camera tripod. I shoot magnums.
Good Luck