I have two 320's, a Rossi Rubino, and a Savinelli Roma. I like my heavier lat blends like Frog Morton, Larrys blend, McClellands 5110 and the such in the the 320's. The Rossi is almost exclusive to Frog Morton Cellar.
Blends such as House of Lords, Squadron Leader, or other lighter English are used in deeper bowls like a Rossi or Sav 101 model.
I only have 10 pipes and all have seen more than one bowl of all of my blends and smoked well no matter what bowl, but certain pipes just feel right with a particular blend.
McClellands club blend Scottish Woods was a great smoke in the Sav 320. Need to get some of that blend. Sent some to my Sister, and her Husband, and they really enjoyed it in a MM General cob.