Category Caliber

Caliber Info

8mm Roth-Steyr: The First Army-Adopted Autoloader Round

Discover the true first army-adopted automatic pistol cartridge: the Roth-Steyr M1907 and its unique 8mm round, engineered for Austro-Hungarian cavalry use.

Caliber Info

38-40 Winchester: Testing the “Weaker” Myth

Explore the true story behind the 38-40 Winchester cartridge myth, revealing its unique design, performance, and historical role versus the more famed 44-40 round.

Caliber Info

41 Long Colt: A Market Failure, Not a Ballistics One

Discover the true story behind the 41 Long Colt cartridge - its strong ballistic performance, key manufacturing flaws, and why it lost ground despite early success.

Caliber Info

7.63mm Mauser: Separating Fact From Broomhandle Myth

7.63mm Mauser vs 7.62mm Tokarev: identical dimensions, different pressures. Mauser ~1,350 fps, 500 ft-lbs, ~36,000 psi (CIP)

Explore the true history and technical details of the 7.63mm Mauser cartridge, separating fact from myth about its power and compatibility with 7.62mm Tokarev rounds.

Caliber Info

30 Luger: A Cartridge Ahead of Its Market

30 Luger: Ahead of its time. Image shows a Luger pistol with toggle-lock action and wooden grip

Discover the history and unique ballistics of the 30 Luger cartridge, a pioneering flat-shooting, low-recoil pistol round launched in 1900 ahead of its time.

Caliber Info

7.62mm Nagant: How the Gas Seal Actually Works

Discover how the Nagant M1895 revolver's unique gas-seal mechanism works, its history, design, and why it remains a standout in firearm engineering.

Caliber Info

9mm Glisenti: Weaker Than It Looks

9mm Glisenti: dimensionally identical, ballistically dangerous. Rated ~30,000 psi versus common 9mm loads at ~35,000+ psi

Discover the crucial distinctions and safety risks of the 9mm Glisenti, a historically unique Italian cartridge often mistaken for the more powerful 9mm Luger.

Caliber Info

9mm Largo: The Dangers of “Close Enough” Ammunition

9mm Largo cartridges have identical dimensions but different pressures: period loads ran about 30,000 psi, modern loads exceed 40,000 psi

Discover the crucial differences between 9mm Largo and 9x23mm Winchester to avoid dangerous ammunition mix-ups in vintage Spanish firearms and ensure safe shooting.

Caliber Info

9mm Steyr: A Practical Identification Guide

Safety alert graphic titled "The Misidentified Round," comparing 9mm Steyr vs 9mm Largo vs 9mm Luger cartridges, with a pistol image

Discover the crucial differences between 9mm Steyr, 9mm Largo, and 9mm Luger cartridges to safely identify and handle each unique historic military round.

Caliber Info

9mm Browning Long: How Logistics Beat a Sound Cartridge

Illustration titled "The Cartridge That Lost," showing a 9mm Browning Long round and FN Model 1903 pistol over a European map, with text: Logistics, not ballistics. 9mm Browning Long: 1903-1946

Explore the history and technical details of the 9mm Browning Long - a competitive cartridge that lost the standardization race due to timing and logistics, not ballistics.

Caliber Info, Powder

Best Powders for 40 S&W Handloading

Warning to verify reloading data: table compares Hodgdon and Sierra powder charges for 40 S&W

Discover expert 40 S&W powder selection tips tailored for target, defense, and hunting loads. Maximize performance with safe, data-backed ammo recipes.

Caliber Info

7.65mm Borchardt: The Cartridge Behind the First Practical Autoloader

7.65MM Borchardt - The first practical autoloader, shown with an illustration of the pistol and a cartridge

Explore the origins and engineering of the 7.65mm Borchardt cartridge, the pioneering bottlenecked design that shaped modern self-loading pistols and their ammo evolution.

Caliber Info

32-20 Winchester: The Cartridge That Survived Three Eras

Three Eras. Legacy Cartridge: from lever-actions to cowboy shooting, featuring .32-20 Winchester ammunition, a revolver, and a lever-action rifle

Explore the unique history of the 32-20 Winchester cartridge, a versatile round that thrived across three distinct eras of American firearms.

Caliber Comparison

.22 ARC vs 6.5 Grendel: Same Bolt Face, Different Mission

Blueprint-style infographic comparing .22 ARC and 6.5 Grendel cartridges, with diagrams showing aerodynamics, speed, mass, kinetic energy, and terminal performance. Headline reads: Same Bolt Face. Different Mission

Compare the .22 ARC vs 6.5 Grendel for AR-15 builds: same hardware, different purposes. Discover which cartridge suits your long-range shooting or hunting needs best.