Originally Posted by Higbean
Originally Posted by joshf303
I find my BTO measurement to the lands with bullet of choice...
Run my 10-12 shot string over MagnetoSpeed to find max pressure and my flat spots in velocity....
Pick my powder charge accordingly...

Load a couple hundred and go shoot it. The shoot/clean, shoot/clean “break in” routine is a waste of time with the custom barrels of today IMO.


This^^^



^^^^^^
Yup

It's already a 'custom' barrel. If the maker didn't lap the barrel before shipping, or did a pi$$-poor job of it (besides looking for another barrel maker) you might want to do a little break-in. But, every 'custom ' barrel I've gotten from a variety of vendors has never needed anything more than what Josh stated.

Clean shoot repeat till cleaning is needed.

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