Where is all of America's ammunition?

Where is all of America's ammunition? - JAZZ SHAW 

"It’s been known for some time now that America’s reserve of munitions has been severely depleted by the ongoing war in Ukraine. 

• Our NATO allies in Europe aren’t doing much better. 

Concerns have been raised as to whether or not we would still have enough ammunition to support a sustained combat effort if we had to defend Taiwan against China or meet any other military threat. 

This is particularly true of our supply of 155mm howitzer shells, which the Ukrainian forces use in vast numbers every day. 

So why aren’t we catching up on the domestic production of these rounds?...