ballistics

10mm: A larger and faster round, with similar bullet weight (sometimes heavier if 200gr+ ammo) compared to .40. In average ccw sized guns (say 4" barrel or less), the ballistics can be strikingly similar compared to .40, but generally more penetration and expansion. Also, more RECOIL, and...

Today’s shoot with the Uberti 1860 gave some interesting data about the power difference between Old Eynsford (a fairly stout powder) and 777 (an even stouter powder), as well as some conclusions about the maximum power historically possible from the .44. The following are velocity and energy...

What type of damage is the smallest production handgun on the market truly capable of? This post will shed some light on that question. Here are the results of my ballistic test with the NAA 22 Short, using a simulated head made by Ballistic Dummy Labs. This accurately simulates the human head...

Sectional Density is a simple calculation being the ratio of the bullet's weight in lbs to its diameter in inches squared. E.g. for a 127gr .264 cal bullet: 127gr * 1/(7000gr/lb )*1/(.264^2) = 0.260 It has units of PSI so it must mean something right? Kind of if you're trying to calculate a...

A thread in this forum asks what are the latest developments in defensive 9mm ammunition, and I thought I'd start a thread on a recent amazing study of not only 9mm but other calibers used by LE agencies. (Mods, I couldn't find any reference to this study through search on THR.) The study...

Beyond 1100 fps @ sea level, the bullet shock wave parts the airflow anyways. It super cavitates the air. It is no longer aerodynamic until it slows back below the speed of sound. Humor me o_O

All my reloading and shooting occurs in Arkansas at elevations between 1000-1800 ft. As most handloaders do, I find the most accurate reasonable load as I work up a rifle-powder-bullet combination. In a couple of weeks I am going to Colorado to a shooting range at about 7-8000 ft...

Just wondering how this works and the relation to real work knock down power? everyone have at it.

I'm writing down an idea for a game, and need to specify what mechanics will exist and how exactly they will work. One thing I cannot find an answer to is how tumbling works, both in flight and on impact on flesh. First, let's assume an omniscient shooter that can account for gravity, wind...