I recently purchased a Savage No4 Mk1 with a 2 grove barrel and 120 rounds of 1981 Winchester 303 British white box ammo, that shoots great in this rifle.
The surplus WCC 81 ammo is crimped, uses a 175 gr flat based bullet, and 46.2 grains of ball powder. It will hold a 2" group at 100 yards and is calibrated perfectly with the ladder sight graduations. It's just hard to find any more, so i'm trying to duplicate the load using Sierra Match Kings.
The problem is my reloads go through the target sideways and HIGH at 100 yards. My loads consist of neck sized brass, CCI large rifle primers, SMK 174 gr HPBT .311 bullets, no crimp, and have tried 39 to 41 grains of H4895 in half grain increments. My first thought was that I loaded .308 bullets, but a quick measurement showed .311. Has anyone had similar problems reloading 303 British and what was your solutions? Thanks, Ed.