October 5, 2024, 08:32 PM | #1 |
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Ballistics App
Is there a free Ballistics App out there that allows you to input known inches of drop which in turn make the inches of drop on the other distances more accurate? I've tried three different apps and none are even close to the known drops that I confirmed just today at the range.
For example, on my .22LR rifle with a zero of 25 yards, I know the inches of drop is 0.75 inches at 50 yards, and 7.0 inches at 100 yards. Or to put it another way: 25y = 0 50y = +0.75" (up 3 clicks) 100y = +7.0" (up 28 clicks) Knowing the above, I need the app to tell me in 25 yard increments, out to 200 yards. "Close enough" will not work because I'm looking for App accuracy within a half inch or so. A free App would be nice, but I know, you get what you pay for. |
October 6, 2024, 08:15 PM | #2 |
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Have you tried “Strelok”? I use the pro version, i forget what it cost but was reasonable. Ive been happy with it.
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October 7, 2024, 12:27 PM | #3 |
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Maybe I'm not understanding your question. But any of the free apps should give you the information you are seeking with inputs of muzzle velocity, BC, and zero distance. Of course with your example of 22LR, there will probably be a significant impact of altitude, humidity, temperature, and (of course) wind speed/direction. Also, with 22LR, there may be significant differences in muzzle velocity between individual rounds from the same box.
If I am wrong or am missing something, I'm sure someone will let me know. |
October 7, 2024, 01:37 PM | #4 | |
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Quote:
You can use ANY ballistic calculator and there are lots of them online. I use this one, but you 1st have to find the BC of the bullet and a pretty accurate muzzle velocity. There isn't anything available with the limited information you've provided. There is a HUGE difference in the velocity between different 22 ammo and even between different rifles with the same ammo and you need that info 1st. https://www.hornady.com/team-hornady...alculators/#!/ I shoot 22's a lot at 200-250 yards. I zero at 50 yards. Not enough difference at 25 to matter and I just never shoot at targets that close. Getting it dialed in at 100 was easy. I used a large backer behind my target at 200 yards just to get hits on paper then kept twisting the dials until I was on target at 200 yards. It takes a good rifle, ammo, no wind, and some luck to get 2" groups at 200 yards. With my rifles, scopes, and ammo I run out of adjustment somewhere between 200-250 yards and have to use some holdover much past 200 yards. But with the right gear you can take a 22 out to 300 and beyond.
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October 7, 2024, 01:56 PM | #5 |
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October 7, 2024, 05:54 PM | #6 |
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jreidthompson, after I made some "tweeks" that one seems the closest I've found so far.
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October 7, 2024, 06:53 PM | #7 |
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I found a preset chart for .22 LR CCI Standard Velocity
https://shooterscalculator.com/balli...php?t=36db2335 Sent from my SM-G781V using Tapatalk |
October 12, 2024, 05:34 PM | #8 |
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Winchester has a great app for what you want. They use Win. ammo as a basis for their calculations.
Federal also has an app for Fed ammo and handholds. An example is a 45/70 with a velocity of 1400 fps for a 300 gr. bullet if shot 1.5 in. high at 25 yds. would be a 100 yd zero
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October 13, 2024, 03:12 PM | #9 |
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Applied Ballistics can do it.
But I do not know if that is a paid feature. (It probably is.) I also do not know if AB is still free (as it used to be), or if the base app is paid now. When I got it, the app was free, but everything beyond the dozen or so free bullet profiles were paid. Bryan Litz (Applied Ballistics) is supposedly hoping to release a new ballistic calculator soon that has been built from scratch for .22 LR. Going trans-sonic so quickly and spending so much time subsonic puts .22 LR in its own world. Standard drag models can't do much with it, accurately. The best thing you can do for .22 LR, right now, is gather dope and build your own drop chart. But, it will only be good in a somewhat narrow window of atmospheric conditions. I, personally, have basic dope for 7 rifles that I use in precision rimfire matches; but I have different dope in four different categories: --Above 40 F --Below 40 F --Really freaking cold (winter matches when daytime highs are well below freezing, often close to 0 F). --Really freaking hot (summer matches - up to 110 F). Obviously, more matters than just temperature. But temperature affects MV more than anything else. So that is the baseline. I adjust from there, given a day's barometric pressure, wind speed and direction, the range's altitude, and whatever other factors might be applicable. Calculators are helpful, but none (that are currently available) are ever dead-on with .22 LR. Sidebar: I find it quite entertaining when people pull their guns and ammo out of their trucks for sight-in before a winter match, and then complain about dropped shots all day, while repeatedly going back to verify zero. (Which only gets them "on" at the zero distance.) Sighting in with warm ammo and then letting it cool to ambient temperature (of, say, 28 F) can have a huge impact on MV. You must choose your path before sight-in and plan accordingly: 1. Keep the ammo warm all day. I do this by keeping loaded mags in a pocket against my body, and a box of ammo on the opposite side. 2. Keep the ammo and mags cold all day. (This is particularly important during active snowfall, to keep snow from melting and then freezing in the action or magazine.) I do this by putting the ammo in the back of my truck as soon as I get up that morning. As long as it stays cold, it will be the same all day. Slow, but consistent. Back in August, we were shooting a 380 yard challenge. In the shade, where my ammo was, it was about 95 F. It was quite interesting, because I shot the same challenge in January, with the same ammo, at about 18 F. Other atmospherics were certainly in play, but my hold was 12 MoA different, between those two temperatures.
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October 13, 2024, 10:08 PM | #10 |
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BA is now a pay app. Both Winchester and Fed. ballistic apps are free and you can plug in ambient temp. and altitude, sight in distance, crosswind, height of scope, etc. you can learn the BC from their ammo. Hope this helps.
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October 14, 2024, 07:17 AM | #11 |
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JBM Ballistics has a bunch of free calculators, the trajectory or basic trajectory calculator will do what you ask. You can search the bullet library and it has a lot of data on rimfire cartridges. I don't know if it'll be accurate within +/- ½ inch, as it's only as good as the data you input. It will not give you holdover based on your scope reticle like the other Ballistic apps like Strelok, Hornady, Bushnell, and........
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October 18, 2024, 01:58 PM | #12 |
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Yeah, finding a free app with that level of precision can be tough. You might want to try Strelok or Ballistic AE—while the full features aren't free, they’re often more accurate when you dial in specific drop data like yours. You can also adjust the inputs, like velocity and BC, to get closer results. For really dialed-in accuracy, though, sometimes a paid app is the way to go.
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October 19, 2024, 11:39 AM | #13 | |
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Quote:
Most "free" ones from the Optics manufacturers and Ammo manufacturers do not have the capability the OP seeks. I am only aware of those functions in the paid apps. I use AB and Shooter most often. |
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October 19, 2024, 04:34 PM | #14 |
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Shooterscalculator.com
I use it for what you want. I just don't go that far out. |
October 21, 2024, 10:58 AM | #15 |
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Mike 38,
You may have a terminology confusion. Many calculators show Total Drop, which only matches your real drop if your bore is horizontal when you fire. What you are describing, I think, is trajectory drop. This can be found in a number of programs as sight adjustments (come ups) in MOA that you can convert to inches by multiplying them by pi and by the range in yards, then dividing the result by 300. In other words, if your target is 217 yards away, and your come up is 2.12 moa, you have: 2.12×217×π/300 = 4.817" The other thing to keep in mind is that each bullet has its own exact drag function and that the BC's available in most programs don't match it exactly, as they must for exact drop predictions. The Hornady 4 DOF program has measured drag functions for many bullets, and if your bullet is on their list of measured bullets, it will give you good information about actual trajectory.
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