Staples can differ in wire thickness, crown width, point shape, strip construction, and manufacturing tolerance even when the leg length appears similar. Those details affect how the strip moves through the magazine and how each staple forms under pressure. A supply that fits loosely may still jam, buckle, or clinch unevenly if it was not made for the mechanism. Environmental damage also matters. Bent strips, moisture, and damaged packaging can interfere with feeding. Keep supplies dry, supported, and in their original boxes. When several staplers share one cabinet, separate each staple family clearly so staff do not rely on a quick visual match during reloading.