Why 200 yards? Time of flight.
It amplifies everything to extremely obvious extents.
I didn't understand a whole lot regarding rimfire when I started tinkering with 22lrs in 2011.
I figured aim, shoot, hit the center, done. You can imagine how well that worked out.
Picking off tree rats isn't punching paper, learned that real fast. Rifle quality, setup, bench,
conditions and ammunition were worked with and tested until I had a basic understanding.
Pushing the range further and further showed there were still things going on that I didn't comprehend.
Where were those odd strays coming from? How do you compensate for wind and still have fliers
that ended up to the left when the wind is moving right. Why so much vertical spread with one cartridge
and so little with another.
At 25 yards most rimfire will chew up a bullseye.
At 50 yards half decent ammo will produce moa results.
100 yards and you have to have competition grade ammo to obtain consistent moa.
At 200 yards, you have to do everything right, and have the best ammo available.
200 yards and most rifles will stay on paper, allowing me to work on my skills
while keeping it challenging. 50 and 100 yards don't make me grin like 200 yards does
when I do everything right and end up with moa results. Easy is boring, l like having to work for it.
How does 200 yard results apply to lesser distances?
Apply the half third rule, remember? Half the distance means one third the spread.
I have the challenge of long range and can calculate the results at lesser distances.
Shoot a 4 inch group at 200 yards, means 1.3 inches at 100 yards and 0.4 inches at 50.
200 yards is simply more entertaining.