yeah went full ham with an assault class gun a while back, got my first MVP. It defo makes a big difference, but then next round same gun went negative k/d lol - it's so hit and miss from one round to the next
Some of this can be explained by current bugs.
Some animations will have dodgy hit boxes associated with them.
Apparently if you spawn on a horse, when you get off you still have an iron chest plate so you had when on the horse so you can sponge body shots.
General BF lag.
Invisible barriers around partially destroyed assets
I've had some truly shocking rounds KD wise