"Uncanny precision" refers to the extremely accurate or exact nature of something, to the point where it seems strange or unnatural in its level of detail or correctness. Full definition
The personal flaws of the work and pensions secretary are replicated with uncanny precision at the department which he runs. (politics.co.uk)
Its predictions continue to match experiments with uncanny precision. (discovermagazine.com)
Considering that Eratosthenes calculated the radius of the earth with uncanny precision, I'm not very impressed with an error like this. (religion.blogs.cnn.com)