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Page AR-15 » Rimfire and Pistol Calibers
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Posted: 6/20/2011 8:25:05 PM EDT
I have a Primary Arms M4 red dot mounted on a CMMG conversion. It's zeroed in at 25 yards. What will my point of impacrt be at 50 and 100 yards? At what distance will it also be zeroed?
Thanks,
Ed
Link Posted: 6/20/2011 9:22:07 PM EDT
[#1]
It depends....on your ammo. Good idea might be to do some searching based on what ammo you are planning to use. Here is a start, some info on Federal .22's. If you poke around much with some search engines you will find a wealth of information and charts on this subject as this question gets asked all the time.

Look here:

Federal Rimfire Information

Once you get to that page just pick out your round and click on the "Details". You will get charts on all sorts of info on your rounds. You can find this info at many sites around the net.
Link Posted: 6/21/2011 5:14:53 AM EDT
[#2]
Thanx John, I did the research a while back. Others may disagree but IMHO keeping your targets at 100 yards or less is where any 22 ammo shines.
There's a lot of drop and possible wind drift beyond that point. 25 yards to 100 yards, I found an 8 to 10 inch drop. Yes, you can compensate, fairly
easily with a scope like the totally trick 4-16X that Walmart sells but for me, beyond 100 yards is a bit much to ask of the 22 LR.

Dave S
Link Posted: 6/21/2011 7:10:18 AM EDT
[#3]
Not sure of your optic height over bore but this may give you some rough approximations based on some rough estimate inputs.
Load Data
~~~~~~~~~

Name: 22 LR given 1200fps, .125 BC, 3 in scope over bore 25yd zero
Ballistic Coeff: 0.125
Bullet Weight: 40
Velocity: 1200
Target Distance: 85
Scope Height: 3.000
Temperature: 70
Altitude: 500

Ballistic Data
~~~~~~~~~~~~~~~
 Range  Elevation  Velocity   Energy     ETA         Drop      Max Y  10mph Wind Deflect
 0 yds   -3.00 in  1200 fps   128 fpe  0.000 sec    0.00 in  -3.00 in    0.00 in
25 yds    0.04 in  1127 fps   113 fpe  0.065 sec    0.79 in  -1.00 in    0.36 in
50 yds    1.36 in  1069 fps   101 fpe  0.133 sec    3.28 in  -0.34 in    1.39 in
75 yds    0.80 in  1022 fps    93 fpe  0.205 sec    7.67 in   0.84 in    3.03 in
100 yds   -1.83 in   982 fps    86 fpe  0.280 sec   14.12 in   2.60 in    5.20 in
125 yds   -6.71 in   948 fps    80 fpe  0.357 sec   22.83 in   5.01 in    7.91 in
150 yds  -13.98 in   917 fps    75 fpe  0.438 sec   33.93 in   8.12 in   11.09 in
175 yds  -23.75 in   890 fps    70 fpe  0.521 sec   47.51 in  11.99 in   14.68 in
200 yds  -36.21 in   864 fps    66 fpe  0.606 sec   63.80 in  16.67 in   18.72 in
225 yds  -51.57 in   840 fps    63 fpe  0.695 sec   82.98 in  22.25 in   23.25 in
250 yds  -69.90 in   818 fps    59 fpe  0.785 sec  105.13 in  28.75 in   28.17 in
275 yds  -91.29 in   797 fps    56 fpe  0.878 sec  130.35 in  36.24 in   33.48 in
300 yds -115.97 in   777 fps    54 fpe  0.973 sec  158.86 in  44.79 in   39.21 in
325 yds -144.30 in   757 fps    51 fpe  1.071 sec  191.01 in  54.52 in   45.46 in
350 yds -176.35 in   739 fps    48 fpe  1.171 sec  226.88 in  65.49 in   52.17 in
375 yds -212.20 in   721 fps    46 fpe  1.274 sec  266.55 in  77.73 in   59.29 in
400 yds -251.88 in   704 fps    44 fpe  1.379 sec  310.06 in  91.28 in   66.78 in
425 yds -295.61 in   687 fps    42 fpe  1.487 sec  357.61 in 106.22 in   74.66 in
450 yds -344.05 in   670 fps    40 fpe  1.597 sec  409.87 in 122.79 in   83.11 in
475 yds -397.36 in   654 fps    38 fpe  1.711 sec  467.01 in 141.05 in   92.11 in
500 yds -455.64 in   639 fps    36 fpe  1.827 sec  529.11 in 161.07 in  101.60 in
525 yds -518.97 in   624 fps    35 fpe  1.946 sec  596.26 in 182.91 in  111.56 in
550 yds -587.42 in   609 fps    33 fpe  2.068 sec  668.54 in 206.61 in  121.94 in
575 yds -661.62 in   595 fps    31 fpe  2.192 sec  746.56 in 232.40 in  132.86 in
600 yds -741.20 in   581 fps    30 fpe  2.319 sec  829.97 in 260.21 in  144.19 in
625 yds -827.55 in   567 fps    29 fpe  2.450 sec  920.14 in 290.50 in  156.18 in
650 yds -920.78 in   554 fps    27 fpe  2.584 sec 1017.19 in 323.35 in  168.81 in
675 yds-1021.01 in   540 fps    26 fpe  2.722 sec 1121.25 in 358.83 in  182.03 in
700 yds-1128.36 in   527 fps    25 fpe  2.863 sec 1232.42 in 397.03 in  195.81 in
725 yds-1242.91 in   515 fps    24 fpe  3.006 sec 1350.79 in 438.03 in  210.10 in
750 yds-1364.76 in   502 fps    22 fpe  3.153 sec 1476.47 in 481.89 in  224.89 in
775 yds-1494.83 in   490 fps    21 fpe  3.303 sec 1610.37 in 528.96 in  240.30 in
800 yds-1634.20 in   478 fps    20 fpe  3.457 sec 1753.56 in 579.63 in  256.44 in

Moving Target Lead Data
~~~~~~~~~~~~~~~~~~~~~~~
Range       5 Mph     10 Mph     15 Mph     20 Mph     25 Mph     30 Mph     35 Mph     40 Mph     45 Mph     50 Mph     55 Mph     60 Mph
 0 yds    0.00 ft    0.00 ft    0.00 ft    0.00 ft    0.00 ft    0.00 ft    0.00 ft    0.00 ft    0.00 ft    0.00 ft    0.00 ft    0.00 ft
25 yds    0.47 ft    0.95 ft    1.42 ft    1.89 ft    2.37 ft    2.84 ft    3.31 ft    3.79 ft    4.26 ft    4.73 ft    5.21 ft    5.68 ft
50 yds    0.97 ft    1.95 ft    2.92 ft    3.90 ft    4.87 ft    5.85 ft    6.82 ft    7.80 ft    8.77 ft    9.75 ft   10.72 ft   11.70 ft
75 yds    1.50 ft    3.00 ft    4.50 ft    6.01 ft    7.51 ft    9.01 ft   10.51 ft   12.01 ft   13.51 ft   15.01 ft   16.52 ft   18.02 ft
100 yds    2.05 ft    4.10 ft    6.15 ft    8.20 ft   10.25 ft   12.30 ft   14.35 ft   16.40 ft   18.45 ft   20.50 ft   22.55 ft   24.60 ft
125 yds    2.62 ft    5.24 ft    7.86 ft   10.49 ft   13.11 ft   15.73 ft   18.35 ft   20.97 ft   23.59 ft   26.21 ft   28.83 ft   31.46 ft
150 yds    3.21 ft    6.42 ft    9.64 ft   12.85 ft   16.06 ft   19.27 ft   22.48 ft   25.70 ft   28.91 ft   32.12 ft   35.33 ft   38.55 ft
175 yds    3.82 ft    7.64 ft   11.46 ft   15.28 ft   19.10 ft   22.92 ft   26.74 ft   30.56 ft   34.38 ft   38.20 ft   42.02 ft   45.84 ft
200 yds    4.45 ft    8.89 ft   13.34 ft   17.79 ft   22.23 ft   26.68 ft   31.13 ft   35.57 ft   40.02 ft   44.47 ft   48.91 ft   53.36 ft
225 yds    5.09 ft   10.19 ft   15.28 ft   20.37 ft   25.47 ft   30.56 ft   35.65 ft   40.75 ft   45.84 ft   50.94 ft   56.03 ft   61.12 ft
250 yds    5.76 ft   11.51 ft   17.27 ft   23.03 ft   28.79 ft   34.54 ft   40.30 ft   46.06 ft   51.82 ft   57.57 ft   63.33 ft   69.09 ft
275 yds    6.44 ft   12.87 ft   19.31 ft   25.75 ft   32.18 ft   38.62 ft   45.06 ft   51.49 ft   57.93 ft   64.37 ft   70.80 ft   77.24 ft
300 yds    7.13 ft   14.27 ft   21.40 ft   28.53 ft   35.67 ft   42.80 ft   49.94 ft   57.07 ft   64.20 ft   71.34 ft   78.47 ft   85.60 ft
325 yds    7.85 ft   15.70 ft   23.56 ft   31.41 ft   39.26 ft   47.11 ft   54.97 ft   62.82 ft   70.67 ft   78.52 ft   86.38 ft   94.23 ft
350 yds    8.59 ft   17.18 ft   25.77 ft   34.36 ft   42.95 ft   51.54 ft   60.13 ft   68.72 ft   77.31 ft   85.90 ft   94.49 ft  103.08 ft
375 yds    9.35 ft   18.69 ft   28.04 ft   37.38 ft   46.73 ft   56.07 ft   65.42 ft   74.76 ft   84.11 ft   93.45 ft  102.80 ft  112.14 ft
400 yds   10.12 ft   20.23 ft   30.35 ft   40.46 ft   50.58 ft   60.69 ft   70.81 ft   80.93 ft   91.04 ft  101.16 ft  111.27 ft  121.39 ft
425 yds   10.90 ft   21.80 ft   32.71 ft   43.61 ft   54.51 ft   65.41 ft   76.32 ft   87.22 ft   98.12 ft  109.02 ft  119.93 ft  130.83 ft
450 yds   11.71 ft   23.43 ft   35.14 ft   46.85 ft   58.57 ft   70.28 ft   81.99 ft   93.70 ft  105.42 ft  117.13 ft  128.84 ft  140.56 ft
475 yds   12.55 ft   25.09 ft   37.64 ft   50.18 ft   62.73 ft   75.28 ft   87.82 ft  100.37 ft  112.92 ft  125.46 ft  138.01 ft  150.55 ft
500 yds   13.40 ft   26.80 ft   40.20 ft   53.60 ft   67.00 ft   80.40 ft   93.80 ft  107.20 ft  120.60 ft  134.00 ft  147.40 ft  160.80 ft
525 yds   14.27 ft   28.55 ft   42.82 ft   57.09 ft   71.37 ft   85.64 ft   99.91 ft  114.18 ft  128.46 ft  142.73 ft  157.00 ft  171.28 ft
550 yds   15.16 ft   30.33 ft   45.49 ft   60.66 ft   75.82 ft   90.98 ft  106.15 ft  121.31 ft  136.48 ft  151.64 ft  166.80 ft  181.97 ft
575 yds   16.08 ft   32.16 ft   48.23 ft   64.31 ft   80.39 ft   96.47 ft  112.54 ft  128.62 ft  144.70 ft  160.78 ft  176.85 ft  192.93 ft
600 yds   17.01 ft   34.02 ft   51.02 ft   68.03 ft   85.04 ft  102.05 ft  119.05 ft  136.06 ft  153.07 ft  170.08 ft  187.09 ft  204.09 ft
625 yds   17.97 ft   35.93 ft   53.90 ft   71.86 ft   89.83 ft  107.80 ft  125.76 ft  143.73 ft  161.69 ft  179.66 ft  197.63 ft  215.59 ft
650 yds   18.95 ft   37.90 ft   56.85 ft   75.80 ft   94.75 ft  113.70 ft  132.65 ft  151.60 ft  170.55 ft  189.51 ft  208.46 ft  227.41 ft
675 yds   19.96 ft   39.92 ft   59.88 ft   79.84 ft   99.80 ft  119.76 ft  139.72 ft  159.68 ft  179.64 ft  199.60 ft  219.56 ft  239.52 ft
700 yds   20.99 ft   41.98 ft   62.98 ft   83.97 ft  104.96 ft  125.95 ft  146.94 ft  167.94 ft  188.93 ft  209.92 ft  230.91 ft  251.90 ft
725 yds   22.05 ft   44.09 ft   66.14 ft   88.18 ft  110.23 ft  132.28 ft  154.32 ft  176.37 ft  198.41 ft  220.46 ft  242.50 ft  264.55 ft
750 yds   23.12 ft   46.24 ft   69.36 ft   92.48 ft  115.60 ft  138.72 ft  161.84 ft  184.96 ft  208.08 ft  231.20 ft  254.32 ft  277.44 ft
775 yds   24.22 ft   48.44 ft   72.66 ft   96.88 ft  121.10 ft  145.32 ft  169.54 ft  193.77 ft  217.99 ft  242.21 ft  266.43 ft  290.65 ft
800 yds   25.35 ft   50.70 ft   76.06 ft  101.41 ft  126.76 ft  152.11 ft  177.46 ft  202.81 ft  228.17 ft  253.52 ft  278.87 ft  304.22 ft
Link Posted: 6/21/2011 7:25:53 AM EDT
[#4]
As others have said - it's going to vary based on your ammo (mainly the velocity).
Here is a trajectory table based on scope-over-bore height of 1.63" (that's where the red dot on my CMMG Evolution sits), and a 40gr projectile at 1250fps.  This table uses your zero specs - I prefer to zero my .22 at 85yds.




Link Posted: 6/21/2011 7:42:49 AM EDT
[#5]
Height over bore for iron sights is 2.5 inches roughly.  Not sure where CMMG and sight you are using is at.
Link Posted: 6/21/2011 8:18:23 AM EDT
[#6]
I got the cmmg stainless kit a few months back.  I also have the Primary Arms M4 mounted on my bushmater.  POI with Federal 550 bulk dropped about 4 inches.  I have two marks on my red dot adjustment, one for 22lr and one for 5.56 zero.  I love the conversion and I'm currently looking to purchase a supressor within the next few weeks.  I'll warn you now,  8 inch steel plates at 100 yds get boring after a few magazines.
Link Posted: 6/21/2011 12:21:24 PM EDT
[#7]
Looking at the charts and reading the info I find that if I zero my .22 at 25 yards it rises slightly and then hits zero again at about 50 yards. After that it drops with that drop accelerating as it approaches 100 yards. (Due to the rapidly slowing of the bullet) Like Dave said, maybe -8" at 100 yards.

Since I grew up using a .22 as a hunting rifle for small game I stuck with the 25 yard zero as that covered what I needed for squirrels and rabbits in the woods quite nicely. If I had to try to get a ground hog out to 100 yards I aimed high (recall the 8" drop at that range). A standing ground hog is a much bigger target than a tree rat. Besides, at 100 yards you could see the bullet impact and adjust before the hog ran off.

Now, there are folks here that shoot out to 200 or 300 yards with their .22 just for practice, but there are some major drops out there.
Link Posted: 6/21/2011 1:38:48 PM EDT
[#8]
my ballistics for Wolf ammo:

25 yds:  -.01 inches
50       :    zero
75       : -2.2
100     : -7.5
Link Posted: 6/21/2011 7:12:01 PM EDT
[#9]
Thanks for all that responded with good useful info!
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