Not sure if this is what your are looking to do, but adding a smoker tube to the cook has made all the difference in additional smoke flavor for me. I got this one off Amazon...goes for about 4-5 hours when full. You can fill it with wood chips or your normal pellets. Get it lit, let it burn...
Definitely noticed the same on my 590 - I did test my two removable RT probes in a cup of ice water and they were on point (32 degrees F). On my cooks, the grill grate level always measures hotter than the built in probe, and the left side grill grate is cooler than the right side, and it's off...
I will tell you that my RT-590 consistently measures hotter at the grate level than what the built-in probe measures by about 10 degrees over the couple of cooks I've tested. And, the right side of the grate surface is always hotter than the left side - anywhere from 15-30 degrees hotter over...
I've gotten a bag of RT Ultimate Blend off Amazon:
https://www.amazon.com/RecTec-Grills-Ultimate-Blend-Pellets/dp/B01DDI0WX0/ref=sr_1_2?crid=NTPOTLS52N5R&dchild=1&keywords=rec+teq+pellets&qid=1611080014&sprefix=rec+teq+%2Caps%2C167&sr=8-2
Possibly...what I have learned is that all butts cook differently, and could be impacted by many things like outside temp, wind, the stall, spritzing, etc. I'd like to give a definite answer, but would instead say it's better to be done a few hours earlier than to have to rush the cook, so...
The cook time at 225 sounds about right, I would've said 16-18 hrs at 225. At 250, you will speed up the cook a bit, and could definitely be done sooner than that. Are you going to spritz throughout the cook with anything? I find that slows my cook down when I do.
@Dan, what an awesome story! THIS is the kind of customer service I read about RT having before purchasing, have personally experienced myself (on a much smaller scale), and now continue to hear after the fact. This kind of stuff also just makes me feel like there is still good in the world...
Yeah, I replace my foil every 2 cooks or so, or after a long overnighter (like a pork butt). I do smooth it out to allow for the drippings to run down properly, as I noticed in the first cook I did that grease and drippings wouldn't drain properly unless it was a smooth path sloped down towards...
Interesting...I've used heavy duty foil to foil my drip tray and never had any of those issues. Now the preventing rust thing that @Chris_G is interesting, I'd hope it won't rust any time soon!
Very possible. Haven't tried higher-temp cooks on my RT-590 yet.
And that's exactly what I've done with this pork butt, put the thicker side on the right. ;-)
I tend to see a lot of Smithfield and Swift here at Food Lion/Harris Teeter/Lowes Foods here in NC. Had an issue with Swift being spoiled upon opening the package a few months ago. Smithfield butt is currently on the smoker, and have had Smithfield before without issue.
I'm not super-scientific or anything, but do like to pay attention to the small details as well. Currently running a 7lb pork butt on my RT-590, and have the set point at 220 and the stationary probe on the left (the one that's sticking up about halfway up the cook chamber in the air) is...
@Chris_G Yeah, I found that out the hard way with my Orbi mesh router...what a PITA to get it set up on my network. But once I did, it's has at least allowed me to operate the grill from the app. The temp chart has been the thing not working well for me.