Ok, well I figured out how to give every bullet a max lifespan of 10secs. It successfully removed all bullets after 10secs without any errors.

Now I have to figure out a way to make the tracer/smoke effect stop for bullets that don't run their impact/entity/ or block event. Any ideas?

Really would be nice to figure out why some don't do it. Could it be that the bullets strike the inside of my tank's bounding box before they are launched away? And that disables the event?