MPI of Lee enfield No.4 MkII UF55 series

[ToineS]

So now to throw a crushed crab into the mix, before all else buy different brands of ammo and maybe even tailor some reloads and find what best groups in the rifle me I'd go with option 2 and reloads but it depends on how often you are going to shoot the rifle.
Get the best grouping one and keep that then do the sight -.060 as no use going with changing the sight and finding the dispersion is up sh*t creek at 600yds.
Now here is what I think is the kicker with all this palava trying to get the correlation on the sight ladder to bullet strike with modern pills they just fly flatter so you may get the impact on at 100 but still find your correlation does not match up at say 600 yds. I am interested to see if it all

I see your point and all things being equal, I’d wholeheartedly agree.
The thing is, the maximum range I’ll be shooting at is 100 yards. Once in a blue moon and at a stretch I might even be able to shoot at 300 yards. Anything more is just not available here.
So I would like to shoot the required three inches too high at 100 yards (sight at 200) as that will put the impact on target with a six o’clock hold. For the 300 yard range I might be off, but not by too much, I guess.
That setup would be fine by me.
I’ll use some other brands of ammo, but I doubt they’ll raise the aim by several inches at 100 yards.
Besides, next to self loading (which I don’t do), there is only one other brand available here, so not much choice…
Btw: the groupings are fine. No problem there.

But my main question was if anyone with a UF55 serial Lee Enfield No.4 MkII experienced that same problem?
I guess these aren’t too common here?

[CINDERS]

All my 303's that I use on the range which is 4 of, all have their original as issued front blades as I use one load for all of them including the T I have the DOPE from 100 - 600m and none of the elevation for distance match up as the 174SMK's fly allot flatter and I am driving them at 2440fps.
It was time consuming in the beginning but now that I have it on paper and XLS its easy without having to swap blades so as Jim has suggested try different ammo or reload get one that groups and go from there doing up a dope chart.

As what can happen when one starts faffing about (PL's words sorry Peter) it may or could possibly create other issues like possible damage to the front sight block, its just a bit easier option to do the range time plus you get to shoot allot which is never a bad thing.
I'm all for leaving things as original as can be done, as it is part of the rifles journey once you start pulling bits off and swapping out stuff it loses its patina and identity.
But its your rifle its just the way I treat my gear as I have seen so many No.4's and MkIII's just ruined be add on's that were never part of the deal or stuff swapped out like say a windage rear sight on a 1940's dated MkIII.
Cheers to all the smelly owners out there.......

[ToineS]

UPDATE:
First off, thanks for all your advice. It all really helps!
I’ve managed to find a front sight blade that I need, according to the calculations provided in the Lee Enfield knowledge articles.
I knew it was a No.1 MkIII sight, but took a chance anyway.
Happy to report it fits like a glove, out of the box!
Hopefully now I don’t need to set the rear sight at 450 yards to hit something at 100 yards.