If you plan to use a lens, like a 0.5, as was mentioned the 4-6 range should be good. I can check my front sight to see what I used last at 1000yds. When in doubt, get the bigger iris.I asked around and came across cooper sight from Australia he will ship to Canada also so I should be good I ordered one
What aperture range does everyone recommend? Plan to shoot 300-900 meters
I was recommended a centra Goliath but there’s 4 different ranges and I’m not familiar
19600002 2.3-4.3 19600001 2.8-4.8 19600003 3.8-5.8 19600004 5.5-7.5 19600006 6.5-8.5 19600007 8.0-10.0
The gehmann irises are also good. There is a place in Germany, but I can't remember the name that shipped one to me many years ago.