I thought OP rather refers to how the pellets are applied one by one
Yes, that was my point exactly.
Basically, all the pellets hit the target at the same time, or within a tiny time window in the order of milliseconds or less. Yet, the pellets afflict damage one by one, allowing the target to die or fall unconscious between the hits.
This is unrealistic, of course. But the same would apply to auto shots. Real-world weapons fire bullets at a very high rate. It's impossible to fall to the ground after being hit by the first bullet and before being hit by the second.
By the way: Sorry for posting into the wrong forum. Can somebody move the thread to "Open Feedback" or "Suggestions"?