IMPORTANT: Starting March 1, 2026, billing for Science of Accuracy subscriptions ends permanently.
Website access and standalone content will be discontinued soon after. Transition now to AB Quantum™ to keep enjoying – and dramatically enhance – your educational journey through AB Quantum™ which now incorporates the Science of Accuracy Academy™ in the AB Learn tool and directly interact with AB content using AB Spotter.
The Science of Accuracy is Transitioning to AB Quantum™ with AB Learn and AB Spotter
The podcasts, instructional videos, and other content previously on The Science of Accuracy Academy™ site are now accessible via AB Learn, built directly into AB Quantum™ and available with a PRO-level subscription. No more separate logins or browsers: watch, listen, and learn on the go, then immediately apply insights directly in AB Quantum™.
The Future Is Here: AB Spotter – Your Personal Ballistics Expert
With the latest AB Quantum™ update (3.5) and a PRO level subscription, we’ve integrated AB Spotter: an advanced AI assistant trained exclusively on the complete Applied Ballistics knowledge database. This includes:
- All Applied Ballistics books
- Every white paper and technical resource ever produced
- The full library of podcasts and videos from The Science of Accuracy Academy™
- Device user manuals, setup guides, and troubleshooting documents
AB Spotter lets you directly interact with this vast expertise in real time. Ask detailed ballistics questions – from deep dives into aerodynamic principles, spin drift causes and corrections, precise WEZ assessments, gun profile optimization, to app settings, Bluetooth connectivity issues, device compatibility, licensing, and more – and get accurate, trustworthy answers grounded solely in Applied Ballistics’ authoritative sources. It’s like having Bryan Litz and the entire AB team available 24/7 right inside your phone, ready to explain concepts, solve problems, and guide you to better shots.
Benefits of Switching to AB Quantum
- Direct, Conversational Access to AB Knowledge: AB Spotter turns passive reading/watching into active Q&A – get instant, personalized explanations for any ballistics topic or app/device question.
- More Cost-Effective: No separate subscription required for education – AB Learn and AB Spotter are part of AB Quantum’s ecosystem.
- Superior On-the-Go Experience: Mobile-first design means your full library + AI expert travel with you to the range, hunt, or match – ask questions in the field and get answers without delay.
Update 3.5 featuring AB Spotter and AB Learn is available now. Download today, subscribe, and explore AB Spotter by asking your toughest ballistics questions, and experience the next level of precision shooting education and support.
Hi Bryan, Francis… could AB provide any comment on twist rate and gyroscopic stability for anyone wanting to build a subsonic centrefire? For example, 300BLK and the 8.6BLK are popular, and the latter with seemingly ridiculous twist rates like 3:1. Generally speaking, for someone wanting to run heavy for calibre bullets with small powder volumes to operate below supersonic, what do you suggest with respect to twist? Or maybe it is too early to ask this question!? 🙂
Hi Michael! That is exactly what we are currently working to test. There is a lot of work to be done to characterize “optimal” twist rate and what defines optimal stability with subsonic flight. There are tradeoffs with increasing twist rate that go beyond stability, which is why we are deep-diving into the subsonic projectile ballistics. Great question!
Appreciate the reply, thanks Francis! All the best from Australia.
Hello, thanks for continuing to work on this topic. After watching the podcast, however, the whole matter sounded to the viewer that slugs for airguns are at the beginning of development and that all slug manufacturers so far generally have the same shape.
As the owner and lead developer of Altaros, where I have been developing CNC turned lead slugs for the past 5 years, I disagree with this as we have been going a completely different route in shape and design than others and for the past year and a half our slugs, especially the ATP King 40gr .22 and ATP Smooth 50gr .25 have been winning competitions all over the US and the world airgun community ranks us not at the top, but #1 in terms of best slugs. In terms of ballistic coefficient, to use the words of some of our customers, this is not an evolution but a revolution in airgun ammunition.
Even other manufacturers have started to copy the shape of our ATP Smooth slug.
Unlike them, I have no one to copy and we are leading the development, and thanks to the CNC turning technology we have had the opportunity to try very many possibilities and observe many laws that appear with the shape but also the ratio of the dimensions of barrels and slugs. We also have quite a bit of information, the aforementioned stability issues for specific velocities and slug shape vs barrel twist. Muller rules still work here, but it has its specifications.
We have developed slugs ranging from small ones that use a conventional airgun, to long slugs over an inch in length and weighing over 130gr in .25 caliber that can already compete with the lighter calibers in .223 in fireamrs as they have a G7 BC of around 0. 217 and by the time we are able to shoot them with SD 0.6-1 fps (25 shots string) the whole setup gets very close to firearms out to 400-500m and sometimes further, especially if factory ammo is used.
It would be good if this information was also heard. We don’t need advertising as there is a 1-2 month wait for customers as we are not keeping up slugs production, but I would like the audience to have balanced information, especially since most of them won’t be from the airgun community.
At the same time, I believe that we would also deserve some recognition for over 5 years of slug development for airgun and a contribution to the entire airgun community, when we showed how much BC is still on the table even for small light projectiles in .22 caliber and 40gr (ATP King BC G1 0.21 ) compared to a .22LR .
I compete with pellets, what would be the best method of getting an accurate BC given it´s neither a g1 or g7 profile? Is the GA profile good enough for .177 round nose pellets?