I had two Steyr 6.5mm rifles one the Rigby Mannlicher Mdl 1892 and a pre 24 Model 1903 Schoenaeur. The Rigby had an excellent bore but the 1903 barel had been relined at some point and not very well. Through Ron Wharton a brand new in the white Steyr barrel was found and obtained which was then fitted by Lewis Potter.

I made a stepped brass bore guage with the steps inceasing by 0.001" and both barrels were found to have bores of 0.256". Both barrels including the brand new one had grooves of 0.268" so the grooves are in fact 0.006" deep and not 0.004" that is popular in the US. These are NOT oversized bores but correct to the specs of the design for these cartridges. Sadly there was no date of manufacture on the new barrel of it's packaging so we do not know when this was made.