I suggest you mark the complete load info on each lot or box, photo it before selling and have the buyer sign a receipt acknowledging he knows it is reloaded and assumes the risk of using it.
I spent 35 years in the insurance claims industry. What I can tell you is that your home owners insurance policy may not defend you if you are sued, because this is a business. Exception would be if it is just an occasional sale. Without coverage, you are responsibe for cost of defense counsel and that could run into very large dollars.