Best Statistical tool to compare groups

#1
I have three groups of weight (ug) data (group 2 & 3 taken in succession on day 2 so can also be grouped as one set) of 10 replicates. I am trying to see how reproducible the weight checks are. The testing is destructive for each sample. I want to see what the accuracy and reproducibility of the method is. What are the best statistical tools to use in minitab for this. I have tried the standard boxplots etc but would value your opinion on how best to present this data. All data appears to be normally distributed