then with the help of a carbide tipped dead centre and a spot of jeweller's rouge I cleaned up the chamfer on the inside of the barrel so that all the lands are trued up.
Michael
I'm speaking from the experience that I have attained as a Smallbore Target Shooter at National Level, (Anshutz 0.22 Rimfire), and Fullbore Shooter at Local level.
Our local Gunsmith, who also competed in both Small and Fullbore, would crown our Barrels square to the Bore, not Chamfered.
Experiments have been conducted within our controlled 25 Yard Range, (indoors, no wind & Benchrests), which strongly indicated that a 'Square Cut Crown' is much more accurate than a 'Chamfered Crown'.
A few years ago, I had a .223 Cal Target Rifle which would only shoot 150mm 5 Round Groups at 300Metres with the original Factory Chamfered Crown.
This Rifle, after being Block Bedded and Square crowned, then achieved consistant 50mm 5 Round Groups at 300Metres in still conditions.
All of these Groups were shot off a Bipod from Prone Position with self loaded Ammunition.
Murray.