Defense of Leyte Gulf Invasion Fleet
This post San Bernardino Strait AP round census is from one of the posts there, with my inserting the ship gun sizes:
The West Virginia, California and Tennessee had the most advanced fire control radars. The other ships had the older Mark III fire control.West Virginia (16-in) had the least AP and had 107 rounds of AP remaining
Maryland (16-in) had 192
California (14-in ) had 177
Tennessee (14-in ) had 327
Mississippi (14-in ) had 189
Pennsylvania (14-in ) had 360
None of the ships had fired even half of the AP shells they had, although they were not originally carrying a high proportion of AP shells, and had expended a lot of HC in shore bombardment. The WV and Maryland had 800 shell capacity and the rest had the capability to carry 1200. by that measure they were low on ammunition.
Maryland fired on the West Virginia's splashes at San Bernardino Strait while the Pennsylvania was either masked by other ships, or had a confused Mark III picture, and did not fire her main guns at all.