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Posted: 6/20/2011 8:25:05 PM EDT
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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 |
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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. |
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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 |
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 |
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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. 
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| 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. |
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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. |
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