What part of the bbl is crowned?

[Bubba]

Do you measure 11 deg. from the face of the muzzle or the length of the bore?

[BBBBill]

11 degrees is measured from a flat 90 degree muzzle, i.e. cut the muzzle perfectly square, then 90-11=79 degrees.
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[Bubba]

Thanks BBBBill, You answered my question! :)