As others said, for 220 it's easier to go with plastic. Even the cheap little "Ansco" type plastic outfit was made to take two rolls of 620/120 on the same reel. I did find that I had to increase developing time, though I found that they worked fine for 220. I was doing a lot of copy work with 220 film I had gotten very cheaply. Before I discovered that the ease of the Ansco-type tank for 220, I found that if I shot a blank frame at frame 10 with my Pentax 6x7, I could cut the 220 in the middle and load it on separate ss reels. I only recommend that if you can reshoot easily. I could never load 220 ss reels worth a darn. For me, for 220, plastic was the easier way to go.
John, Mount Vernon, Virginia USA