Recent content in Articles on Ammolytics
Year two of Ammolytics was a bit of a mixed bag, though that's true for 2020 in general. As my end of year metrics will make evident, I did not conduct as many experiments, publish as many articles (or any videos), or share many new projects as I would have liked. That's not to say that nothing was accomplished, simply that the backburner is a bit more crowded. Despite this and the constant…
In the first part of this series, I spent a significant amount of time and energy measuring several dimensions of the same rifle cases, over and over for five firings. The goal was simple – to measure the relationship between the weight and volume of the cases. The theory-first approach I took does have its merits, but admittedly the results were a bit less clear. Another valid way to…
2019 marked the first year of Ammolytics! Working on the articles, experiments, and projects that I've created has been incredibly rewarding for me. I've learned so much and I'm always thrilled to hear from readers who've enjoyed reading. I'm proud of the work I've done so far and am excited about what I have planned for 2020. It's beneficial to take a moment to look back on what I've accomplished…
Weight-sorting brass has become a fairly common practice in the world of competitive rifle marksmen and precision reloaders. Similar to bullet sorting , this operation seems intuitive when the goal is maximizing consistency by minimizing variation. Those who sort their brass by weight may believe that case weight is directly proportional to case capacity and a shortcut to the tedious process of…
Throughout my life, I've always learned more from failure than success. This is a story of a recent and epic failure of mine and what I learned from it. It isn't the usual technical deep-dive I typically write about, but it's equally important – it demonstrates learning lessons the hard way. More specifically, it's about attitudes during competition and their influence. This was a moment…
Which chronograph should I buy? Most likely, you've been asked this question, heard it asked, or have asked it yourself. I certainly have. It's no wonder, with so many options to choose from, each using different techniques and offering greater accuracy and precision than the rest. Since high-quality chronographs are an essential tool for the work I do here at Ammolytics, I thought it would be…
There are some aspects of the reloading process which tend to be significantly more time-consuming than others. Obtaining consistent, to-the-kernel precision on every round is one of those. I've tried a lot of different tools and techniques over the years to save time without sacrificing quality. Stop me if you've heard this one… RCBS Chargemaster, modified with straws and new programming,…
The inexpensive rifle accelerometer project was a huge hit. It was reshared and featured on other sites like Adafruit , Hackaday , ITS Tactical , and The Firearm Blog ! Since then, many readers reached out to me with ideas and suggestions. I'd like to provide a quick update on the progress that's been made thanks to support from readers like you. Thank you! In a hurry? You can find the code and…
One of the conclusions that I drew from my Recoil vs Muzzle Velocity experiment was that my reloading practices had some room for improvement. There were two slow rounds in one of the 10-round groups that disappointed me and I had suggested that it might relate to my bullet sorting method. I used this opportunity to create another experiment – to measure the impact of bullet sorting by…
You may have already read about this little gizmo from my previous article, where I used it to measure the relationship between Recoil and Muzzle Velocity . Of all the feedback I received, the accelerometer definitely generated the most interest. What you may not know is that it wasn't the first experiment I had intended to use it on. My original plan was to correlate rifle movement to my 600 yard…
Earlier this summer, one of the F-class shooters in our league was trying to diagnose an issue with his new rifle. He was using a reliable load that he had previous success with, but his chronograph was showing some pretty extreme muzzle velocity variation of around 35 ft/s. Remembering a SnipersHide article I had read about recoil management technique contributing to inconsistent muzzle velocity…
This is the inaugural post on the Ammolytics Blog. Welcome!
Ammolytics is a collaborative data-analysis platform, with the goal of improving the signal-to-noise ratio of information and ideas within the firearm and competitive marksmanship community. The Author Hi, I'm Eric! I created Ammolytics out of my passion for statistics, computer-science, marksmanship, physics, and education. Here are a few things about me that you might find interesting: 🇺🇸 I…
Overview The following sample clips were recorded in Nov 2022 with a Phantom v1611 camera rented from Aimed Research . Goals Amplify any "harmonic" movement of the barrel that occurs before the bullet exits the muzzle Measure the characteristics (e.g. frequency, mode) of the movement for comparison between configurations Measure any visible deflection in muzzle direction at bullet exit which may…