Any Math Guru's in here?

[Clayne_b]

Help me figure out how much adjustment this is please.

Bulldozer is 120 yards away. Mil value is Half so 1 Mil is really 2.

Here it is zeroed out

Here is the total adjustment used for shooting 500 yards with the .22lr

Also I am not using the scope for this adjustment. it is all in the base.

reference Picture, 1 mil= 2 mil

I came up with 25 mil
So if 25 mil at 120 yards is 108 inches?
then 108x 500yards is 540 inches so that's 45 feet of drop?

My head hurts now

 

[Wham-O]

Why....Are you not happy with that bulldozer operator?

 

[Clayne_b]

he makes to much noise... ha ha jk

Sorry let me try and explane better.

The dozer is just a point of reference and is 120 yards away

Pic 1 is where my 50 yard zero is

Pic 2 is where my 500 yard zero is with the gun not moved.

Mils are correct at 12x but i have it on 6x to get more of it in view

So what i am trying to figure out is how much that movement is to see how much drop it takes to shoot 500 yards.

 

[TheRiflist]

umm just a guess but numbers might be wrong....108''(9 feet) of drop over 120 yards? maybe. anyways its not 108 inches by 500yards
should be 108 x 120/500 yards roughly only if the bullet keeps travelling at the same speed the entire time(it wont tho and theres a point where all bullets will exponentially drop of the graph and not even be worth shooting that far, especially if you have to aim 45 feet above your target to hit it. theres a rimfire ballistics chart in a sticky here says about 3 feet of drop at 175-200 yards. im also goin to trying to be shooting 500 yards soon, I've been looking at the variable gantry mount as an option or an .17 hmr. anyways let us know how it goes in the field after firing thx and hope this helps a bit... i might not be in full understanding either and 45 feet might actually be closer to the truth

 

[Dr.Lector]

..... should be 108 x 120/500 yards roughly .......

108 x 500/120

 

[Dr.Lector]

45 feet sounds like the right ball park,
depending on the ammo, of course.

Most charts for 22 stop at about 2-300 yds/meters
or do not show drops larger than maybe 60in, because,
as TheRiflist sez, the curve becomes very steep.
So you have to use a ballistic calculator,
or shoot and "walk" the impact point to 500 if you can.



http://www.canadiangunnutz.com/forum/showthread.php?t=63954

 

[gwilder]

If you know the point of aim drop is 108", then just divide 120 into 500 and mutiply that by 108. I get 450", or 37.5'.

What you don't seem to have is a target of known height. Go measure from the top of the cab to the bottom of that hub. Just before dark might be the best time.

 

[smelly pete]

So...you already have your 500yd zero, and are just looking for the number? 45' sounds right by the mil math? Colour me confused.

 

[Clobbersauras]

Interesting thread. Clayne, I wonder what type of base you are using? How much does the base physically move to adjust it to 500 yards? Would this be measured in mm or cm?

 

[Tazzy]

First thing you have to do is clean those tracks and drop the ripper................

Shoot for the extinguisher

 

[ben hunchak]

Why don't you just use inches and feet like a normal person?