Dusty Boots Posted May 20, 2020 Share Posted May 20, 2020 I am happily a new owner of a Shiloh Sharps 1874. I purchased a used rifle that came with a MVA long range vernier sight. I have no experience with this type of sight. I would like to know if there is any information/app/formula that lets you plug in variables to determine the height setting of the sight for a known distance and elevation. I would like to shorten the learning curve. Thanks DB Link to comment Share on other sites More sharing options...
G W Wade Posted May 20, 2020 Share Posted May 20, 2020 Find an exterior ballistics calculator program. Some are available free online. Believe Real Guns website is still running Print out a chart thru the ranges your interested in GW Link to comment Share on other sites More sharing options...
irish ike, SASS #43615 Posted May 20, 2020 Share Posted May 20, 2020 First what are you shooting as far as ammo and what distances. Most ballistic helpers are based on known loads/bullets using smokeless powder. Link to comment Share on other sites More sharing options...
The Original Lumpy Gritz Posted May 20, 2020 Share Posted May 20, 2020 Don't trust those charts to be exact. They never are.... To many variables involved. Start keeping a log book of temp, altitude, load data, and learn to read wind and mirage. Sure hope you plan on using real BP in that Sharps. OLG Link to comment Share on other sites More sharing options...
Hoss Posted May 21, 2020 Share Posted May 21, 2020 You find your “zero” typically at 100 yds. Then if you know your muzzle velocity, Bullet weight and ballistic coefficient you can enter that into a ballistics calculator. It will give you the settings for a given distance. It will be pretty durn close. Yes wind can affect the Bullet, and to a lesser extent atmospheric conditions, but the calculator will be close and a good starting point. my Shilo Sharps likes 535 grn Bullet, 25 grns 5744 powder Link to comment Share on other sites More sharing options...
watab kid Posted May 21, 2020 Share Posted May 21, 2020 what caliber did you buy ? never mind - i reread the topic Link to comment Share on other sites More sharing options...
Desert Pete SASS #42168 Posted May 21, 2020 Share Posted May 21, 2020 15 hours ago, The Original Lumpy Gritz said: Don't trust those charts to be exact. They never are.... To many variables involved. Start keeping a log book of temp, altitude, load data, and learn to read wind and mirage. Sure hope you plan on using real BP in that Sharps. OLG This is the best way to get data for your gun. There are too many variables. And, depending on distance, altitude, humidity, wind and/or rain or snow, things change. Start a good log and keep it updated. Link to comment Share on other sites More sharing options...
Jasper Agate Posted May 21, 2020 Share Posted May 21, 2020 20 hours ago, Dusty Boots said: I am happily a new owner of a Shiloh Sharps 1874. I purchased a used rifle that came with a MVA long range vernier sight. I have no experience with this type of sight. I would like to know if there is any information/app/formula that lets you plug in variables to determine the height setting of the sight for a known distance and elevation. I would like to shorten the learning curve. Thanks DB Congrats on the Shiloh!! We've heard this question time after time. The best answer I can give you is as others said keep good notes. As far as charts go we recomend getting a setting either 100 or 200 yards using a load at BP velocity and use 12 minutes of sight change per 100 yards. That should get to close enough to make the proper adjustment. Jasper Link to comment Share on other sites More sharing options...
John Boy Posted May 21, 2020 Share Posted May 21, 2020 Dusty - buy some Lyman 457123, Postell bullets weigh 535grs - reload with black powder and read this write up on Shiloh Rifles. You may not be possibly shooting bullseye's but you will be on the targets at different distances for yards and meters "come up's" ... http://www.shilohrifle.com/forums/viewtopic.php?t=15931 If you are going to shoot smokeless powders ... Your on Your Own for specific range testing and trajectory calulations Link to comment Share on other sites More sharing options...
John Boy Posted May 21, 2020 Share Posted May 21, 2020 Dusty, as mentioned: 45-70 trajectory settings are specific to bullet weights, powders and charge weights. If you let me know which of any of these you will be shooting - send me a PM: 45-70 50 PJ Money/70gr KIK 2F 45-70 74 349Lockcore/32.6A5744 45-70 50 405 HB/23gr 4198 45-70 100 CPA 457125 45-70 50 L457677/68gr KIK1.5 45-70 50 BACO M1/70gr KIK1.5 45-70 100 PJ Creedmoor/68gr KIK 2F 45-70 20 405 HB/23gr 4198 45-70 50 L457124/29.1gr XMP 5744 45-70 50 CPA L457631 45-70 20 L457661/70gr CTG 45-70 50 PJ Money/70gr KIK 2F 45-70 50 L457677/20gr KIK 1.5 45-70 50 L457132/68gr KIK 2f 45-70 50 PJ Money/70grKIK 2f 45-70 25 Lone Star Creedmoor/65gr KIK 3f Link to comment Share on other sites More sharing options...
Wyatt Earp SASS#1628L Posted May 21, 2020 Share Posted May 21, 2020 Nothing about ballistics nor trajectory, but this article is very helpful in explaining how to adjust the sight. http://tmtpages.com/vernier.htm Link to comment Share on other sites More sharing options...
El diablo gringo Posted May 21, 2020 Share Posted May 21, 2020 Dusty, everyone has provided really good info. Here is what I’ve learned. Start at 50 yds and get on paper. You can easily go to 100 yds then adjust. 100 to 200 is relatively easy to adjust to. Once you get to 300 then you can perform load testing. If your loads are accurate at 300 then they will usually perform well at greater distances. The most import thing is to have a good spotter with good quality optics. When I started shooting bptr John Boy was my spotter and mentor. You can’t ask for a better teacher. Gringo Link to comment Share on other sites More sharing options...
Sedalia Dave Posted May 21, 2020 Share Posted May 21, 2020 You can get a lot of answers in the Technical section of BPCR.net. How to use Vernier sights, adjust set triggers and more. Link to comment Share on other sites More sharing options...
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