How to use Group Analysis for Zero Angle | 4DOF Ballistic Calculator 

I'm getting some major bugs in the android app - can't save groups at all, crashes on photo import... Can you add a feature to aggregate groups? That would be awesome. Hit probabilities calcs would also be very cool. Maybe I'm going too nerdy but I would personally appreciate a p-value/effect size calc for comparing groups (loads) and determining whether the improvement is statistically significant and the confidence level based on the means, POI variance, sample size etc. Perhaps an 'advanced'/load development tab - I've been trying to do it in a spreadsheet using x,y data from the app... My stats is a bit fuzzy from school/uni 😆

Awesome info and an equally awesome app. Thanks for all you do!

Having trouble understanding the math for shooting groups at yardages other than 100 yards. In Jacobs example his 302 yard group was .81 inches high but he had 1 Mil dialed in his turret. H entered -9.96 inches into the Zero Angle Screen. Shouldn't the correction for the turret setting be 0.81 - 10.87 = -10.06 inches? The app is much easier and faster than measuring 20 impacts with a Calipers and entering the numbers into a spreadsheet. And more accurate and less prone to errors.

Accuracy in range input, for this should we measure from the muzzle or from the turrets? I see turrets mentioned in a lot of places as that is where the correction happens. What does Hornady suggest?

I would love to analyze bigger groups, but here is the problem: I can NOT get the factory ammo I want to shoot. It is YOURS*, a standard caliber that has been around for a long time, but it seems that you are not making it available. Calls to the company can be interpreted as "tough going, dude, you do not count." Podcasts are excellent and informative, but I need to fill my shelves. *300WM Outfitter

On my Samsung Galaxy S22 Ultra, I'm still not able to use an existing group photo, and I'm not able to Save or Share the group after entering a photographed group. Is there going to be an update to fix these problems on the 4DOF program? I want to use the Group Annalisis function, and I don't mind the $5 price, if it works.

Unfortunately, it is currently impossible to combine group analysis of multiple groups - so if I shoot 4x 5 Shots to different holding Points - how do I combine the Results to use them in setting up Zero angle?

Make an app that doesn’t BACK calculate it out.

The most confusing app ever