WSM would NOT get temp up

For cooks where I want to hold over 300 I always use lump....there is a major difference in how high you can push the temps when using lump compared to briquettes. I have no issues holding 325+ when using lump, regardless of the outside air temps.

Start with a full chimney of lit coals. That should get you over 300. If not, add another.

I re-use briquettes and top it off with fresh ( I bought it all and I'm using it all) - add 20 lit coals to the top and run 300 no prob (more if I like). Just using a poor old, low tech UDS. Oh as to KBB not getting hot... leave the lid off a bit too long,it will peg my thermo and melt my fridge magnets on my intakes.