Range Report New Ballistic Calculator Website

[Lelouch]

I just finished my new website http://www.shooterscalculator.com that you might find useful. I started it just for my own use but it turned out quite well and I'm proud of it and think you guys can find it very useful.

Here is a preview of it in action comparing rimfire cartridges:

Here is a link to the page that shows the graph and drop charts for each cartridge: http://www.shooterscalculator.com/ballistic-trajectory-chart.php?t=f630255c

You can also calculate the muzzle energy, PBR, and recoil. Here is an example using the various rimfires.

Anyways let me know how you like it and how I can make it better for my fellow shooters

 

[DamnYuppie]

Re: New Ballistic Calculator Website

It looks nice. Good job and getting this put together!

 

[azimutha]

Re: New Ballistic Calculator Website

You've done a really nice job with the interface and the charts and the results are pretty close to other calculators I trust. I really like that you can create a link to the results. The graphs are polished.

A couple of suggestions:

1) Allow the user to select mils for output as well as MOA (maybe even select decimal places)

2) It would be cool to show the trans-sonic threshold as well as sound barrier crossing (around 1.2X the SBC)...maybe make that ratio user-settable too.

 

[hank440]

Re: New Ballistic Calculator Website

What's the bc for the CCI minmags ?

 

[jbailey]

Re: New Ballistic Calculator Website

Yes, really nice work. I will put this on my fav list and run a few ballistics thru it next time I'm looking for dopes. Another suggestion: in addition to mils, if you could also add IPHY that would be great (I love IPHY and my USOs). Thanks for sharing...

 

[Lelouch]

Re: New Ballistic Calculator Website

Thanks for the comments!

The addition to the Mil feature would be very useful. It should be an easy add as well because 1 mil = 3.375 MOA. Also that made me think. For mil-dot scopes i can add a feature where you have to input the scope power you will be using to shoot, the power of the scope where it is mil to mil, and it will do the converting for you so it will tell you exactly how many mildots to hold over.

Thats a great idea! Thanks. The trans sonic barrier is interesting as well.

 

[Lelouch]

Re: New Ballistic Calculator Website

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: hank440</div><div class="ubbcode-body">What's the bc for the CCI minmags ? </div></div>

You can see the information for any of the cartridges used at http://www.shooterscalculator.com/ballistic-trajectory-chart.php?t=f630255c

On the right side of the page in the 'Multiple Trajectory Graph' panel select the trajectory from the Trajectories drop down menu and the information will pop up.

The BC I used for the CCI Minimags is 0.138. I got the BC's from the manufacturer's websites and from this useful page from rimfirecentral: http://www.rimfirecentral.com/forums/showthread.php?t=57007

 

[Woj8541]

Re: New Ballistic Calculator Website

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Lelouch</div><div class="ubbcode-body">Thanks for the comments!

The addition to the Mil feature would be very useful. It should be an easy add as well because 1 mil = 3.375 MOA. Also that made me think. For mil-dot scopes i can add a feature where you have to input the scope power you will be using to shoot, the power of the scope where it is mil to mil, and it will do the converting for you so it will tell you exactly how many mildots to hold over.

Thats a great idea! Thanks. The trans sonic barrier is interesting as well. </div></div>

You may want to check that conversion from Mil to MOA. One Mil is equal to 3.438 MOA. If you need clarification on the math, I can help you out with it. Also, it's very difficult to accurately predict the precise subtensions of a 2nd focal plane optic without actually finding true half power with a reticle calibration chart.

 

[subwofer2]

Re: New Ballistic Calculator Website

Dang, nice work so far. Mil would be fantastic for me as well. I also expect there will be a few different suggestions for the conversion of Mil to MOA. All said and done all will result in very similar results.

 

[Woj8541]

Re: New Ballistic Calculator Website

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: subwofer2</div><div class="ubbcode-body">Dang, nice work so far. Mil would be fantastic for me as well. I also expect there will be a few different suggestions for the conversion of Mil to MOA. All said and done all will result in very similar results. </div></div>

There really shouldn't be any different suggestions for the conversion. The units of measure are constant and "fudging" numbers in a ballistic solver only leads to inaccurate predictions. Milradians and Minutes of Angle are angular units of measure which have numerical values. Those values are exact and leave no room for interpretation. That would be similar to saying 2+2 is sometimes 4...

 

[azimutha]

Re: New Ballistic Calculator Website

You should be using 1.0471976 as your constant for MOA (derived from TAN(1/60) * 3,600 (in). 1 mil @ 100 yards subtends 3.6" so the ratio of mils to MOA is 3.4377467. I wouldn't bother with the scope power/subtensions stuff. Focus on what makes your app good, like the multiple trajectories and graphing. I think most mil-reticle shooter are using FFP scopes or use the ranging power on their SFP scopes.

 

[Woj8541]

Re: New Ballistic Calculator Website

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: azimutha</div><div class="ubbcode-body">You should be using 1.0471976 as your constant for MOA (derived from TAN(1/60) * 3,600 (in). 1 mil @ 100 yards subtends 3.6" so the ratio of mils to MOA is 3.4377467.</div></div>

Can't argue with that.

 

[kombayotch]

Re: New Ballistic Calculator Website

Being able to compare the trajectories of two loads on the same chart is an awesome feature. However, most of the time I'm interested in comparing wind drift, not drop... There doesn't seem to be an option for viewing the wind drift chart.