On the general question of accuracy:
On Saturday I tested two rifles - an Ishapore 2A1 and an FN-built K98kicon Israeli Mauser
Both in .308WIN.
Both fitted with aperture rear sights, as I wanted to test the rifles, not my eyes.

Two loads were tried at 100 meters. Not bothered about position, just grouping.

The results illustrate what I wrote in my previous posting.

Attachment 18837

The "Ishy" groups loosely but acceptably enough for an untuned service rifle. Note that the two types of ammo have very different POIs.

The Israeli has none of the tricky stuff with inner/outer bands, springs etc. Just trigger guard screws very carefully tightened up (NOT bedded) so that the barrel is not binding anywere. The group width is astonishingly good for iron sights - about 5/8" - and you cannot tell separate the two types of ammo - the POI is the same.

The height, however, shows the weakness of the Mauser foresight for target shooting - it is easy to hold the horizontal position very precisely, but one only has a vague idea where the top of the inverted-V blade is. So the vertical stringing is worse than with the squarer Enfield blade. The best answer for open sights is, of course, to use a square blade on a Mauser - it's the Carl Gustav, M1896, Swedishicon Mauser - call it what you will, it's good.