Raucous,
The compound that Frank is applying between the two rear engraving bands was tested on the 25mm Bushmaster, and found to increase throat life from 40 rounds cyclic mode, to 2,000 rounds @ 200 rounds per minute.
I do not know ZA barrel life expectancy when used as Frank's video demonstrated, but it should increase significantly. ES holds in the low single digits as an incidental benefit. This is important within the ZA system for two primary reasons; First, I use eighteen grooves, which concentrates a great deal of heat in outside corners of the small lands at the forcing-cone. Second, ZA loads are going to be hot by design. I had the choice of moving to extremely expensive barrel alloys, or find a way to make iron-based alloys live longer in a high heat/pressure environment.
Questions hitting my in-box centered more on the ceramic lubricant than on other aspects of the ZA system... probably because it was mentioned this also works well with conventional bullets. However, I have not done a great deal of work on that application. The video is intended to give readers some idea of how to load banded projectiles in conjunction with the lubricant.
