The question arose as to how many rounds it takes for a rifle to break in and really start shooting. From my observations over the past 10 years or so, it takes maybe 20 shots at the very most, and usually none at all. Back in the good old days, before the advent of rigid receivers and bolts, pillar bedding, synthetic stocks, epoxy, bedding girders, and chassis stocks, the average hunting rifle was stocked in wood, often of a dubious quality, and poorly bedded. When it was shot, it did a lot of of twisting, squirming, writhing, compressing, and expanding before all its parts worked in harmony with one another. Sometimes they never did achieve a Kum Ba Ya moment and the rifle never did shoot well.