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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
How to adjust b.c. to get ballistic chart to match drops
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<blockquote data-quote="BrentM" data-source="post: 2316612" data-attributes="member: 61747"><p>One of the best things you could ever do is take a LRH hunting class. Generally those types of class focus on things that matter for a hunter. Beyond the basic fundamentals typically the focus is on wind and positional shooting. Wind is almost always the problem for any shooter. With todays tech dialing in elevation is pretty straight forward but reading a ghost across mulitple terrain features is challenging but very doable once you know what to look for and why. </p><p></p><p>#1. Get an app on your phone and use it. Study it. Really dig into it so it becomes second nature. If there is an area you don't quite understand, study that area. The app is nothing more the combined knowledge and formulas that are put into one place to make life easier on you. Junk in is junk out tho. One thing shooter is not good at is the wind stuff. I don't use it on an app (I have mulitple apps on my phone) so it doesn't matter to me but some programs have a wind segmenting section where you can run scenario's for all sorts of wind changes in speed and direction and see the results. It's very educational and I use for new student instruction. I have multiple apps because often students are all using different platforms. </p><p>#2. If you don't have a wind meter or app, you might spring for kestrel 5700 elite with applied ballistics and link. Link is the blue tooth portion that will link it to apps and lrf's etc that are set up with it. For example I use a leica 3200.com that links to kestrel and will give solutions as far as my lrf will range. Generally my lrf will range to 3200-3500. Some apps, AB for example, also will link with kestrel so you can see results displayed on your phone. One thing about a good meter is that really shows you the changes in the environment while in that environment. Charts printed and taken are not LIVE so you could potentially be limiting to yourself to less accurate data. Mountains can create their own atmosphere so having live and real time data is ultra important to me. Simple density altitude change at 8000-9000 feet can really screw up a guys day if you are not aware of the changes. </p><p>#3. Bryan Litz is a good resource for educational books etc. There are segments on the AJ portion, formula y=(.01)(sg)-(.0024)(L)+.032. To understand that formula you need a basic understanding of bullet stability and where that comes from. The apps will show you stability, such as the berger twist rate calculator etc. There are short cuts that require very little math for AJ and wind. At any rate the chapter in his book gives you in depth understanding on why and what affect left to right vs right to left wind has on the vertical wind component. Google video's are fun to watch as they illustrate the process. </p><p></p><p>Good luck out there.</p></blockquote><p></p>
[QUOTE="BrentM, post: 2316612, member: 61747"] One of the best things you could ever do is take a LRH hunting class. Generally those types of class focus on things that matter for a hunter. Beyond the basic fundamentals typically the focus is on wind and positional shooting. Wind is almost always the problem for any shooter. With todays tech dialing in elevation is pretty straight forward but reading a ghost across mulitple terrain features is challenging but very doable once you know what to look for and why. #1. Get an app on your phone and use it. Study it. Really dig into it so it becomes second nature. If there is an area you don't quite understand, study that area. The app is nothing more the combined knowledge and formulas that are put into one place to make life easier on you. Junk in is junk out tho. One thing shooter is not good at is the wind stuff. I don't use it on an app (I have mulitple apps on my phone) so it doesn't matter to me but some programs have a wind segmenting section where you can run scenario's for all sorts of wind changes in speed and direction and see the results. It's very educational and I use for new student instruction. I have multiple apps because often students are all using different platforms. #2. If you don't have a wind meter or app, you might spring for kestrel 5700 elite with applied ballistics and link. Link is the blue tooth portion that will link it to apps and lrf's etc that are set up with it. For example I use a leica 3200.com that links to kestrel and will give solutions as far as my lrf will range. Generally my lrf will range to 3200-3500. Some apps, AB for example, also will link with kestrel so you can see results displayed on your phone. One thing about a good meter is that really shows you the changes in the environment while in that environment. Charts printed and taken are not LIVE so you could potentially be limiting to yourself to less accurate data. Mountains can create their own atmosphere so having live and real time data is ultra important to me. Simple density altitude change at 8000-9000 feet can really screw up a guys day if you are not aware of the changes. #3. Bryan Litz is a good resource for educational books etc. There are segments on the AJ portion, formula y=(.01)(sg)-(.0024)(L)+.032. To understand that formula you need a basic understanding of bullet stability and where that comes from. The apps will show you stability, such as the berger twist rate calculator etc. There are short cuts that require very little math for AJ and wind. At any rate the chapter in his book gives you in depth understanding on why and what affect left to right vs right to left wind has on the vertical wind component. Google video's are fun to watch as they illustrate the process. Good luck out there. [/QUOTE]
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