Marble Arms Marble Catch .22 Case MR960. An audible "Catch" is triggered by a specialized "Pause-N-Fire" type mechanism inside the Catch to stop empty cases in their tracks and capture any stray primers or dropping of a loaded round once the Catch is released. Because the Catch is triggered by a plunger or "trigger" and not a roller it causes no damage to fired cases and they fall out onto the floor. Each Catch can hold 50 live round once the magazine has been fully charged. Once the magazine is fully charged the next shot can be taken without losing a single primer. The Marble Catch also allows cases to be pre-conditioned by setting the cases on edge with the "shoulder" compartments on the larger case. This allows the Catch to be reused for future loading. Specifications for Marble Arms Marble Catch .22 Case: Manufacturer: Marble Arms Color: Orange/Black Capacity per Compartment: 50 Package Contents: Marble Arms Marble Catch .22 Case Marble Arms MR960: Marble Catch .22 Case