David, from the Weatherby web site -
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"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."
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Our procedure is as follows:
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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
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Many of our Weatherby rifles get close to their accuracy potential during break-in but accuracy continues to improve with more shooting.
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Stay safe & have a great day!

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

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!

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.