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Taken from Weatherby. Many of our Weatherby rifles get close to their accuracy potential during break-in but accuracy continues to improve with more shooting. We suggest a 20 shot break-in, utilizing two different factory loads (load 1 and load 2) to begin understanding desired barrel accuracy.

Hi David and welcome. It is recommended that you do. 5 round, clean bore, repeat for 5 sets of rounds. This should season your barrel. The next order of business is testing various loads to find the most accurate then stocking up. Cheers and stay safe!

I dont find a need for barrel brakeins as the accuracy from the factory is better than I am anyway LOL

David, from the Weatherby web site - . "We suggest a 20 shot break-in, utilizing two different factory loads (load 1 and load 2) to begin understanding desired barrel accuracy. If desired, after the break-in, begin experimental shooting with different factory loads as each barrel's accuracy is dependent on load and bullet combinations." . Our procedure is as follows: . Clean the barrel* Fire 3 shots (Load 1) Clean the barrel* Fire 3 shots (Load 2) Clean the barrel* Fire 3 shots (Load 1) Clean the barrel* Fire 3 shots (Load 2) Clean the barrel* Fire 3 shots (Load 1) Let Barrel Cool Fire 5 shots (Load 2) Clean the Barrel . Many of our Weatherby rifles get close to their accuracy potential during break-in but accuracy continues to improve with more shooting. . Stay safe & have a great day!