I'll chime in here... I was over at Woody's place yesterday, there to bring him some pellets, but spent a lot of time talking to him.
I was telling him that on my pellet grills ( not Memphis ones ), I generally run around 250F these days, rarely go bellow 225F unless it's for jerky, and do bump up towards 275F.
So, anyway, we got to talking about how he's not getting much smoke out of his Memphis, he fired it up for me, set to 180F ( or maybe 150F, not 100% sure ). Wow, I've never seen a pellet grill produce less smoke. Even as it was starting, there was virtually no smoke coming out of it. I went around and put my nose right up to the area where smoke/heat comes out, and I could not really smell any smoke. I'm honestly perplexed by this.
I had advised that there's likely a 'sweet spot', a certain temperature range that might produce more smoke than other temperature ranges.
I believe the pellets he was using were from me, I had previously brought him some 100% Oak and 100% Cherry both from Smoke Ring BBQ, and he also had some 100% Hickory from LumberJack. I don't know what pellets he actually had in there yesterday. The pellets I brought him yesterday were all 100% Hickory from Smoke Ring, but I know he wasn't using those yet. I probably should take him some 100% Mesquite, just to see what those pellets would do in his Memphis.
I generally don't follow the Memphis threads much, always afraid I'll get that urge to buy one, and I know my pocketbook can't really afford one. But I am now extremely curious what it does take to get some smoke rolling out of his grill.