If you are still in an experimenting mood, I'd recommend that you try the Iscar cutgrip tooling. In my experience, it does not necessarily break the chip, however, they can roll the chip into a nice smooth, tight coil about 3/16 to 1/4" diameter, and the coil may break when about 6" long.
Do the cut in one pass. The Iscar cutgrip is capable of excellent finish at a feedrate of .01 but be aware that setting of the tool is critical to prevent chatter. The cutgrip insert leans ever so slightly away from the cut direction due to the force of cutting, and this creates the insert clearance. So the tool must be set so that this tipping of the insert does not cause it to hog in along the broad nose. Only the corner does the cutting.
I used to turn .350 dia 304 stainless tubing down to .245 OD, leaving a .005" wall thickness with these inserts, one pass only. I also used a mandrel inside the tube for support. Turned length was 5.5", and cnc made it possible to program a gentle arc to counteract the flex of the part, as I had no steady nor follower for this process. I turned several hundred of these, finally I got smart and had tubing custom made for the application
First you get good, then you get fast. Then grouchiness sets in.
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)