I also agree with the others that Step 2 score is probably not important, I was also not asked about it in a single interview. It's probably only useful if you do significantly better than Step 1, especially if your Step 1 was not ideal. Overall, Step 2 score national average is about 10 points higher and if you look at the NRMP statistics on program director survey, the score cutoff most rad onc program directors almost always grant interview is also 10 points higher for Step 2. So, IMHO, if you want to take Step 2 early and send in scores, you should be confident you can do at least 10 points better.
So, if you got 235 on Step 1, a 250 on Step 2 is probably good, but if your Step 1 is already 250, a 250 on Step 2 probably won't help you and may even hurt you.