Just two corrections.....PA sales tax is 6%, not 7% and J&J Pyro is about 7 miles off of I-81, not 2 or 3 miles. I've dealt with Bonnie and never had any problems. You will be picking up the powder at an office attached to her house. Her storage bunker is nearby, no one but her goes there. The last time I went to get powder there was a thunder storm in the area and I had to wait for her to return about an hour until all signs of lightning were past. She wouldn't go in the bunker for fear of a lightning strike.
And for the person asking how far from Chambersburg, there's a distributor in Winchester, VA. that may be closer. From J&J to Chambersburg is about 170 miles.
Bill