Salvage skill broken

I seem to get as little ammo as I got at the start of the game, before I had both salvage skill levels after the latest patch, or even less.
The weirdest thing is finding single BMG rounds in crates and boxes. Given that my salvage skill should give me 100% more ammo, what would I get without it? half a round? Only the bullet? Or a blank?
Something seems very broken with the loot.

If you have the game set in the biggest difficulty , it seems to give you less ammo .

I am playing in skirmish mode which is according to the patch notes the standard level I started with, so nothing should have changed.