I think there are non believers of cleaning that need to watch this.....
The Iosso thing is exactly what Jack and Eric say it is. I Iosso after every agg when I shoot group with the PPC. Score with the 30BR, I still clean but maybe after 2 or 3 targets. You see carbon buildup in it. Not sure how guys feel they can shoot an entire agg without. The Iosso wipes the last bit of copper and carbon out.
Any and all of the info pertains to all levels of shooting.