I noticed that for riles with "internal magazines" (those you have to load one round after another, like 7mm or the Olsson), normally with a full magazine if you shoot one round, and click reload, you reload only one round into it as expected to "top it off". But with "lightning hands" perk level 1 and 2 (haven't tested 3 yet since I do not have enough perks right now), if you shoot one round and click reload, the animation actually shows reloading two rounds into the chamber despite the ammo counter shows only one round is topped, and it is quite confusing.