+The batch size was too small, so I couldn't fill the second casting tube,
+which left grain 4 short.
+
+* Grain 1, 2.990" long, 163.7g gross, 5.50g casting tube, 158.20g net propellant
+* Grain 2, 2.992" long, 163.8g gross, 5.51g casting tube, 158.29g net propellant
+* Grain 3, 2.976" long, 163.4g gross, 5.48g casting tube, 157.92g net propellant
+* Grain 4, 2.650" long, 146.1g gross, 5.52g casting tube, 140.58g net propellant