Glad to hear they finally sorted out your Ruger No1. I did enquire as the the price of them in the UK and once I picked myself up off the floor quickly forgot the idea .

Hmmm I noticed a lot of comments about 303 cases and the strange shapes they assume when in chambers of some guns. Now I have no idea why such variations in 303 British chambers should occur but they sure do. I submit a photo of three 303 fired cases all fired in my rifles not the difference in the shoulder area:-

Hmmm thought I had some more. The middle case was fired in a new BSA manufactured Barrel I got from Mr Knibbs for a rebuild project on a BSA Model D sporter (P-14 based sporting rifle)The barrel was not only blacked but proofed. Seems it was taken off and sent to Parker's for Ball Burnishing and never re-fitted

As you can see it's so marked on the muzzle

The proof marks are from 1954.

The bore riding portion of this commercially cast 205 grain gas checked bullet measures 0.303-0.304" so the groove diameter of this ball burnished barrel is about 0.302"-0.303"

Anyway none of them show the pot bellied look I see described in the thread. Also I seem the recall that the rifling on the Lee Enfield was tapered being 0.0075" groove depth at the throat and 0.0055" deep at the muzzle. The problem I am having it finding the reference to this

.

I also wonder why does SAMMI have to re-design old established cartridges like they do and make a mess of it and cause confusion by doing so?