Breaking In a New Barrel

[Snyper]

A rather rash assumption. Most of the barrels were new. I did decide to try it on a 1917 Swede that I had previously carefully cleaned. To my delight, it worked there, too. The evidence so far is that it works on any barrel, old or new, that copper fouls excessively.

It was not an assumption
It was based specifically on your own words

You'd have to shoot a number of rounds without cleaning to know it "fouls excessively", which means you are not following a "break in procedure"

Your results are just anecdotal evidence, not scientific proof

 

[denton]

It was based specifically on your own words

You'd have to shoot a number of rounds without cleaning to know it "fouls excessively", which means you are not following a "break in procedure"

Please read more carefully next time. You are mistaken.

 

[Berserker]

Belows is from Brownells site. It does make sense to me that custom barrels would need less attention then factory. Sorta goes along with Gale and why you see some factory guns recomending it.

Although we at S.G. & Y. Precision Rifles feel an extensive break-in procedure is not necessary for the custom barreled rifles we build since they all have a hand lapped finish in them. The procedure probably does have some merit when applied to a factory barreled rifle that has an, as machined finish from the factory and a non lapped bore surface.
Custom barrels are lapped to impart a finish to the bore that will produce as little copper fouling as possible throughout the length of the barrel.