Ballistics Arc Issue?

[DamagedGuds]

So, I think I'm having an issue with Ballistics Arc.

When I enter my data, the chart is having me adjust my elevation turret down. Here are a couple of screenshot to show my data input and output. If there's a known issue with the latest Samsung update and the app please let me know. Also, if you need more information I give you what I can.

I'm using Hornady 6.5 ELD-M, 140 grain, with the standard BC units G1 / .646 and/or G7 / .326 off of the box.

 

[ShtrRdy]

I'm not familiar with this ballistic program but I would think "Shot Angle" is the angle which you're pointing up or down. If this is the case then your entry of "90" is pointing straight up in the sky. I think this value should be zero for a level shot.

 

[DamagedGuds]

I'm not familiar with this ballistic program but I would think "Shot Angle" is the angle which you're pointing up or down. If this is the case then your entry of "90" is pointing straight up in the sky. I think this value should be zero for a level shot.

You know this may sound stupid, but I didn't think holding my phone up like that would have affected that. I assumed it was based off of the angle I was holding my camera like on the Strelok app. Even then I guess I didnt pay much attention to that as it's "point and accept" for the angle.

Lesson learned. Thank you. I now feel more stupid after that ??

 

[DuneShoot]

Hold the phone at the same plane you'll be shoot towards.

 

[DamagedGuds]

Hold the phone at the same plane you'll be shoot towards.

Thanks! I didnt realize I had to hold it parallel to the ground.

 

[b6graham]

Thanks! I didnt realize I had to hold it parallel to the ground.

better yet. dont and just leave it at zero unless its actually at an angle thats significant, so like greater than 10

also. sight height at 1.6"? curious what your're running for action/rings/scope

 

[DamagedGuds]

better yet. dont and just leave it at zero unless its actually at an angle thats significant, so like greater than 10

also. sight height at 1.6"? curious what your're running for action/rings/scope

It's 1.75. I'm running a BadRock rifle with .97" Vortex PMR rings, and a viper gen 2 5x25-50mm.

 

[spife7980]

It's 1.75. I'm running a BadRock rifle with .97" Vortex PMR rings, and a viper gen 2 5x25-50mm.

That seems short. But if thats what you get from the middle of the scope to the middle of the bore than it is what it is.

 

[stello1001]

Yup, sight height seems awfully short in my experience. And it's not just one of those things you can disregard as it will matter and either change your MV or drops.

 

[LH_Gina]

Looks like this has already been answered, but unless you're doing so high or low angle stuff, the Shot Angle should be zero. Shot bearing is a different story. Changing the shot angle to 0 will correct the dope issues though. Found this little thing out while helping a coworker set up his BA after he pushed all the buttons he could.

 

[Diver160651]

Looks like this has already been answered, but unless you're doing so high or low angle stuff, the Shot Angle should be zero. Shot bearing is a different story. Changing the shot angle to 0 will correct the dope issues though. Found this little thing out while helping a coworker set up his BA after he pushed all the buttons he could.

Good point sometimes it is more difficult to go back and figure out what is wrong rather than going slow in the first step.

Not to get to into the weeds, but I think it’s worth mentioning BallisticArc has a range card where the direction of fire matters. I bases wind values off your main “weather” screen and effects each target with it’s own DOF individually to respect to the wind from your Kestrel or that page.

Point being, If one is going to use the range card feature, take time to understand it.

 

[DamagedGuds]

Looks like this has already been answered, but unless you're doing so high or low angle stuff, the Shot Angle should be zero. Shot bearing is a different story. Changing the shot angle to 0 will correct the dope issues though. Found this little thing out while helping a coworker set up his BA after he pushed all the buttons he could.

I've been busy at work this week, but when I get a chance I'll take a picture of the rings with calipers for the height.

I wasn't holding my phone at the correct angle. I thought I had to hold it with my camera facing the target, not my entire phone parallel to the ground. Facing with my camera caused my angle to be 90 degrees (way wrong). NOW that I've re-adjusted to 0 everything reads as it should, 2.6 mils vs 44 mils at 500 yds or the adjusted closer yardage.

I appreciate the help.

 

[Redeye3]

I've been busy at work this week, but when I get a chance I'll take a picture of the rings with calipers for the height.

I wasn't holding my phone at the correct angle. I thought I had to hold it with my camera facing the target, not my entire phone parallel to the ground. Facing with my camera caused my angle to be 90 degrees (way wrong). NOW that I've re-adjusted to 0 everything reads as it should, 2.6 mils vs 44 mils at 500 yds or the adjusted closer yardage.

I appreciate the help.

I would also change the bc to mach 1.75 @ .617 g1.. been using the 140s for quite a bit of time at distance and B-Arc with that bc lines up perfect.

 

[DamagedGuds]

That seems short. But if thats what you get from the middle of the scope to the middle of the bore than it is what it is.
View attachment 7093552

Here's a picture of said measurement

 

[DamagedGuds]

I would also change the bc to mach 1.75 @ .617 g1.. been using the 140s for quite a bit of time at distance and B-Arc with that bc lines up perfect.

Is this the BC you get or what's on the box? Mines from the box info and what was automatically input once I selected the bullet.

I know the main issue has been resolved but I'm now gathering what info I can from you all at this point. Thanks, again!

 

[b6graham]

Is this the BC you get or what's on the box? Mines from the box info and what was automatically input once I selected the bullet.

I know the main issue has been resolved but I'm now gathering what info I can from you all at this point. Thanks, again!

you need to get a velocity. and adjust BC to line up with your specific rifle. too many variables.

the published BC is what they got from their rifle. change twist rate (even very slightly) and velocity and it could be very different