Source for ordnance reports from DOD

This outfit “Storming Media” sells copies of all sorts of reports done for the DOD. Ammo related ones are listed under "Guns & Ordnance"
They list about 2,500 under the subcategory of “ammunition and explosives” and many for various types of small arms ammo as well as artillery ammo.
The list includes stuff done in house by Aberdeen, etc and also studies done by contractors. They seem to list all of the reports, although many are “not available” but at least you know those exist.
Looks like the cost is about $1 per page.