Bryan, does AB take atmosphere change into account when shooting at an angle from say 6000ft to 9000ft?
I was playing with Shooter and AB and really never noticed that it's giving an elevation change based on wind direction and drag, that seems sweet, taking the wind data from the last time we shot ELR the wind drag had a spread of 1.3 MOA elevation. That's huge at 1900+yards, wonder how many guys are tweaking their program one day only to see them of another and blaming the wrong element!
High Fence, Low Fence, Stuck in the Fence, if I can Tag it and Eat it, it's Hunting!
Not sure if I am understanding this new program. I have not purchased it yet but will soon.
Can someone tell me if these custom drag models eliminates the need for stepped BC's? If I understand it right, a person would still have to establish his own drops at various distances (more the better) to make a custom drag model. Is this correct?
Well, if AB is Shooter on steroids then it will be a sweet app! Shooter is by far my favorite app as far as accuracy, ease of use, and options! I am looking forward to the reticle tool! Sounds awesome for how I hunt!
I love the website option as well. It would be so much easier and faster to be able to do comparisons and after-shoot evaluations on a full screen home PC. I would also suggest having a nice print screen with lots of options for various chart printouts. This is a feature that many good apps are lacking!
And then get on the iOS system. Apple is all I have right now!
Yes, AB Mobile takes air density change into account on angled shots. ie; when your bullet is going 'uphill', the air density reduces, and it increases on a look-down shot. Not a big difference, but it's known so it's modeled.
Likewise the head and tail wind components are modeled along the trajectory. Again, not a big difference, but all the little things add up.
You're understanding correctly. Custom drag curves are made for specific bullets, not referenced to a standard curve. You can think of it like a stepped BC with like 100 steps to make it match perfectly. This feature is really only a benefit if you're shooting at ranges where your bullet slows below ~1300 fps (transonic range). That's where a bullets' drag curve diverges most from the standards and the benefit of a custom curve is greatest. If you're only shooting in the supersonic range of your trajectory, you probably won't benefit from a custom drag curve.
I downloaded this app a few days ago and have been playing with it. First of all let me congratulate Bryan and the developers, it is a great app. Very similar to "shooter", I really like the feature showing the solution in the reticle, very useful.
Just a couple of suggestions though. As Topshot mentioned, when selecting a bullet it does not populate the "length". Drove me crazy for a while because I could not figure out why it said in the solution that spin drift was off when I had turned it on in the preferences. I finally figured that the bullet length was not in the data, entered it and now I have spin drift data.
The second item is one also present in the "shooter" app. In the HUD the + / - push buttons to change range / wind is very tedious. Why not do it like "BulletFlight" and some other apps that let you scroll to the desired range or wind?
Other than those two minor items it is a great app, thanks for making it available!