Not sure, but I think this is a good deal at MidWayUSA. I have dealt with them in the past and they do fast delivery. The 20 rounders and the 30 rounders are the same price---$9.99. Here is the link: Link The hardcopy sale brochure says "teflon coated", but their web ad says "dry-lube coated". I guess that's the same thing.