Did you ever get a chance to fire those fine old Enfields? They have quite a following in the U.S. I started the reloading hobby with .303 British and a well-used 1941 Lee Enfield No. 4, MK I.
I collect SMLEs and reload for them all. I save my brass by keeping a brass box for each rifle and neck sizing only. I have a couple of different Mark IIIs and a No. 5 Jungle Carbine (with the special hard rubber recoil concentrator on the butt - boy is that a nasty rifle to shoot!) but my favorite is the No. 4 (T) Long Branch. It was reworked by Holland & Holland & still has the original serial numbered scope and matching box. The scope is small and blurry for those of us who are used to modern optics, but it is an extremely accurate rifle.
Just keep your headspace gauges handy. :-D