It might be not exactly 3.3% per stack as they state in the description, but somewhat close to it (which is still enough for a plasma gun “not to reload”).
I guess it works the more you have, the less you replenish, and vice versa (up to 3.3% per stack)
Yeap:
Always be prepared: When you switch to a ranged weapon, if there is at least one layer of ranged expert buff, each layer of ranged expert buff will transfer 3.3% of the current ranged weapon magazine’s bullets from the backup to the player’s currently equipped ranged weapon
When stacking 10 layers, restore 33% of the current magazine’s ammunition. For example, the plasma magazine has 135 rounds. When the magazine is empty, it can restore 135X0.33=44.55 rounds → 45 rounds.
But if there is alrea…