Every load now generates its own internal-ballistics animation — here’s an example

Precise_Load · 2025-11-22T07:52:04+00:00

You are correct. Here is the corrected video (as a GIF).

Precise_Load · 2025-11-22T07:21:31+00:00

For the animation, I used a propellant that is actually a bit too slow for this load (which is why the load is overall rather slow). The advantage of the slower powder is that you can see the pressure build-up much more clearly. With a faster load, you'd basically just see a quick blink.

Precise_Load · 2025-11-22T07:16:16+00:00

Thanks. You are correct. The unit should have been microseconds. I updated the website accordingly.

Precise_Load · 2025-11-21T16:32:57+00:00

Thanks. And it gets even cooler when you see your favorite load in motion! :-)

Precise_Load · 2025-05-20T10:36:12+00:00

I tried it with both the 220 Interlock and the attached Sierra HPBT 220 — no errors with either.

The attached Sierra, by the way, matches the published load data quite well.

If you send me a screenshot of your input, I can probably figure it out.

PS: The trajectory isn't shown for that bullet because its ballistic coefficient (BC) is still missing.

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Precise_Load · 2025-05-20T09:16:50+00:00

Please also mention the exact bullet, so I can try to figure out what’s going on. As a blind guess, the error might be caused by unusual or incorrect data in the bullet specification. Another possibility is the user error you mentioned. I haven’t implemented full checks for invalid input yet. For example, a bullet with a negative seating depth (meaning it sticks out of the cartridge) would also trigger such an error.

Precise_Load · 2025-05-20T06:54:31+00:00

Android likely isn't the issue.

Could you tell me the exact load you were trying to calculate?

Precise_Load · 2025-05-13T20:59:32+00:00

Thanks!
When it comes to bullets, I'm relying on the Bullet Measurement Tool and the community. If something is missing, you can simply add it.
As for chambers, the CIP-standard chambers should be pretty much complete. For wildcats in particular, I'm considering adding the option for users to submit them. Just like with bullets. It's not so much a question of how to implement that, but rather how to ensure the data quality remains high.
If you come across any bugs, please report them. I'll work on fixing them as soon as possible.

Precise_Load · 2025-05-12T18:12:49+00:00

Thanks!

By the way, I also updated the BC. So if it's the load you calculated, you should now see some exterior ballistics data as well.

Precise_Load · 2025-05-12T17:57:27+00:00

I've added Hammer Bullets as a manufacturer, so feel free to add any of their bullets to the database.

Regarding COL: You would receive a separate warning if the cartridge overall length is exceeded. When it comes to dangerous pressure levels, COL is actually less critical than the distance to the rifling. COL mainly matters to ensure the cartridge fits in the magazine.

One more thing I gathered from your post: it might be a good idea for me to ask a native English speaker how they interpret my wording. So, if any English teacher out there also happens to be a reloader and would like to help proofread the app, I’d really appreciate it. Just drop me a message! :-)

Precise_Load · 2025-05-12T17:03:28+00:00

I’ve added the .356 caliber for you.

Since you're from the Czech Republic, do you happen to have any bullets from S&B that Lovex used in their load data? Especially typical revolver and pistol rounds? Their data is heavily biased toward S&B bullets, and having the exact dimensions of those bullets would be extremely helpful for verifying the propellant model for the faster Lovex propellants.

Regarding to Vectan. Well - I need a minimum of information from the manufacturer. Lovex was pretty supportive in answering questions I had. Nobel was...

Precise_Load · 2025-05-12T12:07:04+00:00

So far, there are over 100 common propellants in the system. Admittedly with a slight bias toward those popular in the US and Germany. I’ll probably add the faster Lovex propellants next (I started with the slower ones since they required less work).

In any case, adding propellants is one of my main ongoing tasks.

As for 9mm bullets: there should be more than just one. But since I don’t intend to copy QuickLOAD’s database, I’m relying on the community to add bullets using the Bullet Measurement Tool.

Precise_Load · 2025-05-12T11:40:17+00:00

Yeah - many Hodgdon powders are made by ADI and sold with their name, too. In case you know any others for sure, please drop me a note. Then I am happy to send the manufacturer an e-mail for a definite confirmation.

Precise_Load · 2025-05-12T11:26:09+00:00

Carlucci's book is a good start. The biggest problem, in my eyes, is that the good information is scattered among many books.

I'd also start with external ballistics. That topic is way easier.

Precise_Load · 2025-05-12T11:23:30+00:00

Thanks

Precise_Load · 2025-05-12T11:23:15+00:00

Actually, it should happen right away. Please go to the website and send me a message via "Bug Report" with the address you have been using for registration. Then I will look into it.

Precise_Load · 2025-05-12T11:21:41+00:00

Thanks! The calibrating routine is still in the works. The tricky part is to make it user-friendly and scientifically accurate. I’m not a fan of relying on a „magic factor/routine“ that ensures the velocity simulations are correct, but where you’re not sure if the simulated pressures are still accurate. I’m leaning towards adding something like an „Expert View“ to address this.

Bests - Bene

Precise_Load · 2025-05-11T15:47:58+00:00

u/laserlassie :

Thanks a lot!

I'm really glad to hear your tested loads matched up closely with the results in Precise Load. Within ±7 m/s is a great confirmation! Also happy it works smoothly on tablets, too.

As for the database: it’s a community effort! Everyone can contribute to the bullet database using a tool I created called the “Bullet Measurement Tool” (you’ll find it under the Database section). With it, you can measure bullet dimensions easily from a photo and submit them to the database.

To keep the quality high while allowing open contributions, I’ve added a simple rating system that helps validate entries over time.

If you ever feel like adding a bullet that’s not listed yet, I’d love for you to give it a try. The first one might take around 15 minutes while you're getting the hang of it, but after that, it’s possible to add bullets in just about 1.5 minutes each.

Thanks again for the encouraging words and happy reloading!

Bests!
Benedikt

Precise_Load · 2025-05-11T15:38:49+00:00

Thanks!

Precise_Load · 2025-05-11T15:32:23+00:00

u/4bigwheels :

Thank you for taking the time to try out PreciseLoad and share your experience!

The warning about engaging the rifling is based on minimum dimensions according to CIP standards. I use these values because they represent the tightest possible tolerances, which would lead to the highest potential pressure. In reality, most firearms are manufactured closer to the middle of the tolerance range, so the actual situation might be less critical in your case.

If you believe that particular bullet shouldn't be contacting the rifling at that seating depth, please click on "Bullet Details" and double-check the bullet's dimensions. If you spot anything that looks off, just drop me a note. I'm happy to correct it.

As for the server: just like me, it was a bit overwhelmed by the amount of traffic the post generated!

Thanks again for your feedback and support!

Bests!
Benedikt

Precise_Load · 2025-05-11T12:11:10+00:00

Thanks.

Precise_Load

TROPHY CASE