Funny, I started seeing, and buying, 300BLK in early November. I'm pretty much 50/50 on the counter guys at Shooters. Half the time they don't know what they're talking about, the other half they are friendly, happy to talk guns, and seem to know a thing about what they're talking about enough to hold a friendly chat. They've been so busy lately that it's moot - but I've been surprised how little I had to wait at the counter when I had a question to ask (Wanted to know if they were going to see a M&P9 C.O.R.E. any time soon, and he knew what I was talking about, wanted one too, and couldn't give me a price until they get it in)In October I asked for 300 blackout ammo at shooters and they told me they didn't stock it and said they would not stock it because it was a fad caliber that would not last so i quit asking for it there.