Good Lord........I've got plastic bags full of No 4 and C No 7 boltheads. I must have a look.
Good Lord........I've got plastic bags full of No 4 and C No 7 boltheads. I must have a look.
This was the subject of a discussion on another forum - It does appear that the 'headspace' issue is only on the left hand side of the pond.
One of the UK's main dealers in Enfield rifles actually did some studies - he gradualy reduced (or increased - depending on which way you look at it) the headspace on a NO4 until at 90 thou (0.090") he gave up with no change in accuracy, or signs of cartridge failure.
Ammunition was mil-spec - not the thin walled US made SAMMI specification stuff.
As a wartime measure the headspace was increased to 0.078" and there was talk of going to 0.084", remember that they had no considerations regarding reloading.