MovementAcc

From wiki.soldat.nl

The value of movement accuracy will tell how much the aim is affected by player movement; the higher the value, the more one must stay still to aim properly.

To bypass this so you can make sure your aim is correct, stand still or jet-hover in mid-air while firing. Most good players learn to move between shots, and then stop and hover for the short duration while they're firing.

The weapons MovementAcc affects most are the: Ruger 77, M79, Barret M82A1, and FN Minimi.