According to Gibbed, this info is not kept in SP saves, therefore they cannot be edited. You can however use gibbed to edit the values of each GAWAsset its under Player subsection in RAW tab.
Coalesced editing of the readiness... doubtful... at least to my knowledge has found a way.
I've seen this asked in a lot of forums and the only answer I've found is this:
The readiness value is not stored locally. It's downloaded from the server every time you start the game, so the value cannot be changed by either modding Coalesced or editing the savegame files.
wow thats strange.
gonna test that out and see what happens.
you'd think you'd just remove the burst fire line and it would work. strange coding in these guns.