Let us know what you are trying and how it is failing to meet expectations.
For beef I do Brisket and some Chuck Roasts.
I have done prime rib once and it came out well but I would do a few more things next time to make it even better.
Chuck roasts I smoke to about 160-165F and wrap in it's own juices and smoke until 205-210F where it is good and shred/pull apart tender. I smoke at 275F and I use Lumberjack 100% Mesquite wood pellets with my
AMNPS and mailbox mod... pure heaven!!!
Briskets I trim fat and cut off a large chunk of the flat in a manner that ensures the rest of the flat is uniform thickness, see the image below.
I smoke over a double foiled pan where I throw any of the good meat trimmings, like the cut off flat piece, in the pan so it braises in the juices/fat and much of it becomes burnt ends.
I don't wrap my briskets at all and I cook to where the IT is usually 203-205F when the tenderness probing lets me know it is ready.
I smoke at 275F again with Lumberjack 100% Mesquite wood pellets, my AMPNS and mailbox mod. I find I like 7-8 hours of the Lumberjat Mesquite smoke. It burns perfectly so no harsh mesquite smoke flavor. These briskets are to die for!!!
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I followed Bear's Prime Rib step by step and had really good results. I think my personal preference tweeks will be to marinate the entire roast for 24 hours and I will try a little stronger wood than the 100% Cherry I used last time. I also will omit any wrapping with foil (can't remember if that is even a step).
Haven't worked up to Beef Ribs, mainly because they are a little more difficult to come by.
Not beef, but I did do an Axis Deer Top Round and Bottom Round Roast smoke like it was beef prime rib and wow was it good!
I hope some of this info helps :)