The shiny appearance happens while processing the pellets
The lignin inside the wood is drawn out during the pellet making process. This, along with heat & pressure hold the pellets together.
Some pellet manufacturers use oil to lubricate the dies, as the pellets go thru them, and the shiny appearance can be more pronounced.
Also, as more sawdust is pushed thru the dies, the dies heat up, and this makes the outside shiny.
Some pellets are made of waste sawdust from cabinet shops and millwork shops. Since this wood is "Premium Wood" the pellets do not contain the bark or sapwood. The pellets I get, start with the whole tree. The tree is ground and made into pellets.
Most pellets, on the market, are made of 70%-80% Alder or Oak, and the rest is Flavor Wood. I only stock/sell pellets that are 100% Flavor Wood. In other words, if you buy Apple Pellets from me, the pellets are made with 100% Apple Wood, with no Oak, Alder or filler wood mixed in the pellet. After all, the AMNPS is for producing smoke, not heat.
Most pellets I've tested, work in the AMNPS. I can honestly say that I've not tested Smokehouse Brand Pellets.
Traeger pellets burn very well, even though they are a "Blended Pellet".
Here's a solution......
Layer the Oak pellets I sent you 1/2 - 2/3 of the way up the row, then layer on the Smokehouse Pellets
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