Not new, but this thread seems most appropriate ...
Visiting my parents with their huge backyard over Christmas, I was able to shoot some of my crossbows again without neighbours raising their eyebrows.
One thing I did was testing the Cobra for distance. Using my self-made bolts (about 245gn), I get speeds in the low 200's, which usually results in distances of 250...300 yard.
Shooting 4 bolts at about 45° angle (instinctive, not measured) I got distances between 265m and 285m, translating to roughly 300 yard. Not really unexpected.
The shot distances were measured with a rangefinder.
What surprised me was the stable flight, despite of some stronger gusts of wind.
When doing the same with a vertical bow, there is usually quite some wobble over the first 50 yards.
I also tried the "integrated" iron sight over larger distances, which is 10 ... 20 yards for this crossbow.
The results were mixed, though.
Not that I am unable to shoot with an iron sight, but the Cobra one is a bit problematic - especially the part functioning as "bead".
Here a photo:
The "red dot" functioning as bead is translucent plastic, in a rather fat frontal bar.
Actually there are three in horizontal alignment, but I covered the outer one's with a black sharpie.
But still, with what should I align the notch here ?!?
Results are usually quite consistent, but too high.
For comparison the iron sight I have installed on my Sanlida crossbow, which gives much more consistent results.
The "bead" is part of the sight this crossbow came shipped with.
At least up to 20 yards, accuracy is as good as with a scope.