What truly sets the Sizemaster apart is its revolutionary Power Ring collet resizer. This ingenious system returns every shell's brass base to factory-new, SAAMI-spec dimensions, guaranteeing that your reloaded shells will chamber with flawless reliability in any firearm. Built on a rock-solid, ductile cast iron frame, the Sizemaster provides the rigid platform needed for a lifetime of consistent reloading. This model includes a 1/2 oz charge bar, the standard for most .410 loads, and features a manual priming system that gives you a perfect feel for every primer seat. For the shooter who demands absolute reliability, the MEC Sizemaster is the definitive choice for crafting the highest quality .410 ammunition.