Barrel knots and accuracy

[Thunderbox]

Enfield and Woolwich appear to have used an early form of spark photography to monitor barrel recoil movement as far back as WW1, so they were extremely advanced for the era. There were hundreds of different types of trial carried out on the Enfield Rifle family, and millions of test rounds fired - they probably had all kinds of test rigs and experiments. Whatever they did, the No4 was a masterpiece of production engineering - a multi-million unit mass produced rifle, capable of match target shooting with the most basic of bedding methods....