Do what I do and just rip a pallet open at HD/Lowes and buy a few bags. Unless there's a sign on a sealed pallet saying it's already sold or "DO NOT OPEN", I rip them open at will I don't know how a pellet manufacturer can say their wood pellets are "premium grade" or "super premium grade" unless they are meeting some sort of defined standard set forth by an independent 3rd party (such as PFI). Whether the pellet is PFI rated or not shouldn't matter, if specs are listed on the bag somewhere (i.e. ash, fines, moisture content), or the pellet claims to be PFI premium grade, then you can prove whether or not those specs are true based on your own in-home testing. If the specs are incorrect, the pellet produces more than 1% ash or are loaded with moisture, then claiming the pellet to be "premium grade" is false advertisement, and grounds to pursue a return/reimbursement from the pellet vendor and/or manufacturer.