How US naval guns and shells compared in the First World War

How good were US naval guns and shells during the First World War?

They were roughly comparable to Britain's pre-Greenboy weapons, with more reliable fuzes as an important strength.

The answer places American naval guns and shells broadly alongside Britain's pre-Greenboy standard. It singles out working American fuzes as a distinction from the British experience. Britain is described as having to relearn aspects of fuze design previously supplied by Krupp. This is a brief comparison of ammunition performance, without a gun-by-gun assessment.