Here is my take on Smoked Prime Rib.
Dahl’s Angus Pride, and Brewers Meats, two of the locals are the go 2’s for me, as I always buy the whole sack uncut. At first I started with Sam’s club for a few years, missing real flavor and tenderness that I get from the other two suppliers. Watch all of them for the price and work the stores a bit on a whole sack un-touched. Dahl’s will lower their price better than Hy-Vee’s Amana brand usually. I think the Amana brand is over rated.
Cut the amount you want x2 from the whole rib. We slice the rest for steaks and freeze in Ziploc bags and foil. Due to shrinkage, seconds, care packages and great leftovers for a meal during the week. I’ll smoke a 1/3 to a 1/2 for 4 of us and ¾ to all of one for 6 to 8. I slice to 1 inch +/- for serving.
Internal meat temp @ 130 to 135 not to hit 140 is where we like them. Pull them out and cover with foil for 30 min and better. Time for a ½ was around 4 hour’s fat side up.
For internal temp @ 160 (just pink inside) it’s around 5 hours smoking time.
Cooker temps in smoker 225 to 250, but I believe 200 is too low.
My smoker is a GOSM 3605BGD (Big Block) by Landmann propane unit with the wood box then the water pan above the burner.
Weber kettle grill w/ rotisserie with 2 offset fires of wood only try to keep 275 tops. I have had a fire of 325 to 350 in past and it gets done too fast, but still with good results, but better w/ lower temps. Water filled drip pan under meat.
Time required for a ½ on the grill is about 1 ½ to 2 ½ hours, varies.
With either I use a combo of hickory and fruit wood that is usually cherry or apple and wine soaked oak.