I've used it on several "factory" barrels and I found it to be worthwhile. I had less fouling, and they didn't "walk off" when I shot a fast string. So, "for me", its worth it. I never worried about the "less fouling" as I always fire-lapped any bad "fouler". It was the stress relief I wanted...and got. So what? Its a $100 "gamble", you would spend that much trying to find some good loads, ha. Flip a coin.
