Yes... less value will probably fix it.
This is in connection with your system units and speed of the particles traveling how many units in 1 frame, from what I understand.
Sometimes, I don't even place delete operator, just a display with high saturated red color, so I clearly see them, until I setup velocity properly, then I add delete operator.
And sometimes, if I see "pop-out" when particles are big, and deleting is obvious (and I don't want it to be obvious), I first test their velocity, bring them into the new event, then animate their scale, to be smaller, and then delete them after 10-15 frames.
This is making them disappear in more natural manner.
This is in connection with your system units and speed of the particles traveling how many units in 1 frame, from what I understand.
Sometimes, I don't even place delete operator, just a display with high saturated red color, so I clearly see them, until I setup velocity properly, then I add delete operator.
And sometimes, if I see "pop-out" when particles are big, and deleting is obvious (and I don't want it to be obvious), I first test their velocity, bring them into the new event, then animate their scale, to be smaller, and then delete them after 10-15 frames.
This is making them disappear in more natural manner.