Do You Really Need to Break in a New Rifle Barrel?
BY Herschel Smith
You just bought a new rifle—or maybe had a new barrel installed on an old gun—and are about to head to the range. As much as you want to put a bunch of rounds through it, there’s a little voice in your ear urging caution: Be sure to break in the barrel first!
Chances are you’ve heard this warning from the guy behind the gun counter, or your buddy who’s a ballistic know-it-all, or perhaps from the maker of the barrel or rifle itself—they often include instructions on barrel break-in.
Yep. I have.
When I was first introduced to the concept some decades ago, the explanation given to me was that the first shots through a barrel would smooth out imperfections in the bore left by the tooling that was used to cut the chamber and impart the rifling in the bore. But you also needed to clean the barrel frequently to begin with so that fouling wouldn’t accumulate too thickly on some of these bumps leading to worse problems down the line. If a smear of copper was allowed to form on one of these rough spots and grow, it would degrade accuracy and would be difficult to remove once it established itself—so the story goes.
I know that’s the alleged problem. I don’t believe it. Copper will only foul so far until it gets beaten down and worn off by bullets. Besides, copper needs to fill in the microcracks and grain boundaries in the metal. That’s why I’ve stopped cleaning bores with a wire brush and favor polymer brushes now. I see no need for anything else.
I’ve had many conversations with barrel makers about the break-in procedures they publish and most of them have confessed that the only reason they have a break-in process is because their customers think they need one. Wade Hull at Shilen has come right out and said as much. The general shooter is convinced that a break-in procedure is needed, so the barrel makers have responded by creating them—even if they don’t believe they are necessary.
Third, I’ve tried all these techniques over the years, and I’d be lying if I told you I ever saw a measurable benefit.
Exactly. As you can tell, I don’t believe in barrel break-in procedures. I’ve done it before. I don’t do it anymore and analogize these procedures to superstition.
If you disagree or you can point to actual data that proves otherwise, drop a note in the comments.