Which ballistics app?

Elkaholic Hunter

Previously Ian Wargo
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I found that whatever app I use I end up having to tweak the muzzle velocity FPS in order to get the best match in long range groups. Usually start between the 500 yard target to the 900 yard one.
I think I’ve seen other posts where you’ve said you have to tweak your MV. Don’t mean to come across rude but that is the one thing you should not change (assuming your chronograph is decent, I would check with someone else’s). Your MV should be known and you shouldn’t change that. If you need to tweak anything it should be your BC. That being said inside of 1000 yds if I am not hitting where my calculator says I should it has always been an error in one of my inputs. That’s with Berger and Hornady bullets and the Ballistic AE app. Back to the original posters question I also just downloaded Hornady 4DOF and I have nothing but good to say about it, especially for free
 

Gone Ballistic

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I think I’ve seen other posts where you’ve said you have to tweak your MV. Don’t mean to come across rude but that is the one thing you should not change (assuming your chronograph is decent, I would check with someone else’s). Your MV should be known and you shouldn’t change that. If you need to tweak anything it should be your BC. That being said inside of 1000 yds if I am not hitting where my calculator says I should it has always been an error in one of my inputs. That’s with Berger and Hornady bullets and the Ballistic AE app. Back to the original posters question I also just downloaded Hornady 4DOF and I have nothing but good to say about it, especially for free
Excuse me but, I am 74 years old and entered the use of the word "tweak" into my vernacular at an early age while growing up on a farm. Basically, the word was used to convey fine tune, adjusting to tighter tolerance, improving performance and, well, you get the picture. Perhaps, for people like you who prefer to have articulately composed comprehensive responses, after identifying traits of expression I use from time to time, it might be easier for you to avoid reading any responses written by me. Oh, just so you know what I meant, by the way, is I make an adjustment of the muzzle velocity input in my ballistics table. I have also used adjusting the BC as well but, in the field in a hurry, this works for me. I believe Gunwerks has produced a video explaining how to do it.
You don't mean to be rude? Why are you?
 
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Bill Cauley Jr

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I found that whatever app I use I end up having to tweak the muzzle velocity FPS in order to get the best match in long range groups. Usually start between the 500 yard target to the 900 yard one.
I’ve heard that said many times and when I started I used to tweak velocity myself but later on I have found that when you use a magneto speed or a lab radar you know the correct velocity why would you change that I usually tweak my BC or scope correction factor to get data to line up and I also run multiple BC’s you can look them up in Bryan Litz books ballistic performance of rifle bullets
 

Bill Cauley Jr

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Have a question for you more experienced shooters. If you have a scope that has MOA and you know what the MOA is for 600 and 650 in clicks, why would you even worry about a 633 yard MOA click....seems it would be rather insignificant from 650 yard MOA click? What am I missing?
Nothing
 

Bill Cauley Jr

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I own and play with many of them.

The APP I recommend is the AB Mobile App. It costs around 29$ to purchase app, but it is the same program resident to the Kestrel 5700 with AB.
The biggest advantage to the AB app (Applied Ballistics is the company owned by Brian Litz who is literally a former Rocket Scuentist and the chief ballistitian for Berger Bullets) is the ability to purchase Custom curves for your specific bullet for $1.99. Manufacturers will publish BC’s for their bullets.

G1 - Think flat tail Spitzer
G7 - Think modern Boat Tailed Bullet (What want to use if not using custom curve)

Brian takes the bullets fires them in test rifles using Doppler Radar and from the derived empirical data calculates custom curves representing how the bullets perform in the field. Admittedly the bullet May perform slightly different in your rifle which would lead you to further tweak the ballistic curve out near the transonic regime to give you your own custom curve for the bullet in your rifle (something you can do in the Kestrel 5700). But, in my experience with all of my rifles the custom curves have been spot on to transonic and beyond.

In short for 29$ and a free barometer App (Station pressure) you can turn your phone into a kestrel minus the wind meter. (Think a Kestrel 5700 with Link sells for north of 600 just as an FYI)
Get Bryan‘s book ballistic performance of rifle bullets and yes it cost money but you pay once have hundreds upon hundreds of bullets with your own curves right there I run five BC’s in my apps from that book everything works out very well down range
 

Silent Hammer

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Strelok pro is it. It uses the reticle for your specific scope, and if it's not listed he will add it. He did it for me in about a week. All the options are there for using the app. The free version was good but once you try the pro, you'll be glad.
It's worth the $13
 

Gone Ballistic

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I’ve heard that said many times and when I started I used to tweak velocity myself but later on I have found that when you use a magneto speed or a lab radar you know the correct velocity why would you change that I usually tweak my BC or scope correction factor to get data to line up and I also run multiple BC’s you can look them up in Bryan Litz books ballistic performance of rifle bullets
I was addressing the muzzle fps numbers I enter into my ballistics calculation table which causes a different setting on your scope reticule calculation at the point of impact. I picked this up from Gunwerks ballistics calculator some time ago. By changing the fps in small increments I get a more precise point of impact because it changes the scope settings. You can do the same thing by changing the BC as well. Sorry for the confusion.
 
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