They will be small shank, nothing to worry about there. You did the right thing by buying both go and no-go gauges. I know many people swear by the piece of tape on the case head but I really like my gauges. I also think what you are doing is fantastic. I had plans to do something similar for a family member when they came home from the Afghanistan as a sniper but he was taken from us only weeks after getting home. Keep up the good work.