Thread: Barrel-bore enlargement

This one :
Muzzle Threading — Don’t Remove Too Much Steel « Daily Bulletin

First , sako barrels are hammer forged not button rifled.
Measure the outside diameter of your barrel where the shoulder will end up( typically 12 to 15 mm from muzzle) and you can then comfortably have 1 to 1.5 mm of metal removed from that measured diameter with out worrying to much about the internal dimensions of your bore.

You will notice on the accurate web site article that it concerns noticeably fat button rifled barrels where a good amount of meat had been removed from muzzle.