I have transplanted a large berberis, and I found it difficult. Simply tryiing to dig up a 'rootball' doesn't really work, because the roots don't naturally form a ball. Mine had long deep roots, several feet long, somewhat like a rose. The plant needed a lot of TLC for several months. The plant did survive.
If yours was bought in a container, and had constrained roots, in a ball, then it might be easier.
The leaves of berberis are holly-like, so the plant doesn't tend to wilt like most plants, and doesn't respond to watering in the same way. That just makes post-translant care more tricky.
If we should turn out to have a spell of hot weather, then now would not be a good time.
That's just my experience.