MilPictures.com created this photo of the single shot Steyr HS .50 rifle.
Placing cartridges between the knuckles is a technique popular among single shot rifle shooters. You can see a photo of blogger Albert Rasch using the technique with his .416 Rigby chambered Ruger No. 1 at the top of his blog’s homepage.
[Hat Tip: Max Popenker]