If the rifle was indeed made in 1897 & has been in 303 calibre all of its life, without getting modified over time, it will be calibrated for round nose 215gr bullets of the Mk2/6 pattern.
If the rifle was indeed made in 1897 & has been in 303 calibre all of its life, without getting modified over time, it will be calibrated for round nose 215gr bullets of the Mk2/6 pattern.