On top of what everyone has already said (which I agree with completely). Is that the longer splinter you try to take off in one pull of the draw knife. The more likely you are to get a tear out. Along those line, I have better luck ring. Heading with less issues by chasing a ring up the stave in 6” increments. Instead of working the ring down the stave towards me. Essentially I start chasing the ring in the end closest to me, start cutting in about 6” away. Once yhat section is where I want it, I go to the next 6” section, that way I’m only ever cutting towards a drop in grain layer. Meaning that if it does tear out, it’ll only carry as far as that short section. Plus I like to use a razor sharp knife and use short clicking motions when I get close to my intended ring.
Kyle