Round of the week, the 2.7mm Kolibri Auto
The 2.7mm Kolibri Auto as compared to the .22 Long Rifle The 2.7mm Kolibri Auto is (as far as I know) the smallest commercially available centerfire round that has ever been produced. It is the idea of Franz Pfannl, an Austrian watchmaker and was patented in 1910 and introduced in 1914. It was fired from…
