On 2010-10-26, Don Foreman wrote:
On Sat, 23 Oct 2010 20:08:26 -0500, Ignoramus22870
wrote:
On 2010-10-24, Jim Chandler wrote:
On Sat, 23 Oct 2010 16:35:38 -0500, Ignoramus22870
wrote:
Never mind. I misread what I wrote down. It was 21 feet instead of
12. I made the adjustments and the scope is now dead-on horizontally
and vertically. It actually seems pretty decently made.
i
On 2010-10-23, Ignoramus22870 wrote:
I have a .22 rifle and I am trying to adjust the scope.
Unfortunately, I am limited to 12 feet distance at the moment.
I just made a great .22 target/catcher from a 12x12" 1/4" steel plate
and wood, so I can now work on the scope.
At exactly 12 feet of distance, impacts very reliably end exactly 1
inch to the left.
The scope is this:
http://www.amazon.com/gp/product/B001CRC20G
An adjustment of 1/4" MOA means 1/4 inch per click at 100 yards. 12
feet is 4 yards, so one click means 1/4*4/100 = 0.01 inch. So, to
adjust the point of impact by this much, I would need to adjust the
scope by 100 clicks?
This does not make sense to me. Would it suggest to you that something
is seriously wrong with the scope, or the way I mounted it?
i
Why in the world would you need a scope at 21 feet? Even I could see
that far with iron sights. Sounds like something is wrong with the
scope if it only focuses at 21 feet. Just my thinking.
I hope to shoot farther than that, but as of now, this is all the
distance I have.
i
"Hi velocity" .22 rimfire ammo (40 gn bullet, 1260 fps mv) will drop
about 4.75" at 100 yards if zeroed at 50 yd.
For deviation of no more than +/- 1" from POA (beyond 5 yards) with
scope axis 1.5" above bore axis, the scope should be zeroed at 73 yd.
It will then hit within 1" of POA at all ranges from 5 yd to 84 yd, be
down 3" at 100 yd. Zeroeing at 17 yd will achieve the same
trajectory. It will obviously shoot 1.5" below POA at 0 yd regardless
of scope elevation settings.
"Standard" (1050 fps mv) will drop about 7" at 100 yd if zeroed at 50
yd. Opimal zero range is 63 yd, hits within 1" out to 72 yd and is
down 5.5" at 100. Zero at 14 yd achieves the same trajectory.
Don, thanks for your post. If I start shooting at farther distances, I
will re-zero it at 60 yards. As of now, I am shooting at a much
smaller distance where it is easier to simply adjust the aiming point.
i