4 groove No4 Barrel, not 2, 5 or 6

[K31]

Most Savage No.4's have two groove barrels.

[buffdog]

The following is from the book "The Lee-Enfield Rifle" by Major EGB Reynolds, page 158.

"In May, 1941, trials were carried out with barrels having two grooves instead of the normal five."

"Permission was also given to manufacture barrels for the No. 1 Rifle with four grooves, where such a method was of assistance to the manufacturer. A few of these barrels were made for the No. 4 Rifle."

"In 1942 a trial was carried out with barrels which had three grooves. After 5000 rounds had been fired through them, their accuracy was still good."