Skinner, XS, New England Custom Guns, Williams.
I think Skinner is a better sight than XS, but the XS kit comes with a front sight as well. I haven't stretched out to 200 yards yet, but I easily hit a 6" plate at 100 yards with the XS setup I have and 405gr Missouri Bullet Company Buffalo #1 that I'm shooting.
With the NECG on my Mauser, I'm also consistently shooting 1-1.5 MOA
Nice thing about NECG is they send an adjustment table along with their sights, based on the sight radius of your gun. It takes ***all*** of the guesswork out of finding your zero. The one thing you'll need to figure out is the distance traveled of one complete turn of your elevation and windage adjustment screws (NECG also provides this when you buy their sights).
After that, it's a simple ratio to figure out how much adjustment you need, and if you know how far a full turn pushes your sights, you'll know precisely how many turns, or fractions of turns, to push your sight.
For example, say your first 5 on paper are 6" high and 3" left at 100 yards.
100 yards = 3600"
And say your sight radius is 26"
Your formula for elevation adjustment would be
x/26 = 6/3600
x = 0.043" of down elevation adjustment
since windage in this example is half the distance of elevation, you'd need to push your sight over by about 0.022".
If your screws have 10 threads per inch (they're finer than that, this is just any easy number to fool with), then you know that one full turn of the adjustment screw moves your sight by 0.1" If you have 24 TPI, then one complete turn of the screw would move your sight by 1/24 inch, or 0.042"
The real beauty is you don't even need to measure anything with calipers, provided you know your thread count.
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edit
if you're sighting in at 50 yards and have say a 27.5" sight radius, plus 4" high and 7" left, your formula looks like this
50 yards = 1800", so
x/27.5 = 4/1800 (for elevation)
and
x/27.5 = 7/1800 (for windage)
x = 0.061" of down elevation adjustment, and about 0.106" of windage adjustment.
just adjust the formula to suit the numbers you're using/getting in the field.