MEC Measure Assembly

The MEC Measure Assembly is a precision powder charge dispensing component designed for serious reloaders who demand consistency and accuracy in every cartridge. Built by Mayville Engineering Co., this assembly serves as the core metering system for progressive and single-stage reloading presses, ensuring that handloaders achieve repeatability across large production runs and small batches alike. Whether you're preparing match-grade rifle ammunition or defensive handgun loads, the MEC Measure Assembly is engineered to eliminate powder charge variance—a critical factor that directly impacts ballistic performance and safety.

This assembly features precision ground slides and surfaces machined within tight tolerances and fitted into a primary casting to guarantee dimensional accuracy and smooth operation. The perfectly aligned internal geometry minimizes binding and wear, allowing the measure to deliver consistent charges over thousands of cycles without degradation. The solid construction and mechanical design philosophy prioritize repeatability—each pull of the handle or press stroke meters the same powder charge by volume, eliminating human error and charge-to-charge variation that can affect group size, velocity spread, and point-of-impact. Compact at 5.7 x 2.3 x 7.2 inches and weighing only 0.8 lbs, the MEC Measure Assembly integrates seamlessly into standard MEC press platforms without adding bulk or complexity.

Precision reloaders—from competitive rifle shooters to pistol competitors and handgun enthusiasts—rely on the MEC Measure Assembly to maintain the powder charge accuracy required for sub-MOA performance and consistent felt recoil. The assembly is compatible with MEC progressive and single-stage press configurations and accommodates standard powder measure drums across common calibers from .223 Remington through .45 ACP and magnum rifle cartridges. Regular maintenance, including periodic cleaning and occasional lubrication of the slide surfaces, ensures long-term reliability. For those serious about ammunition quality and seeking a replacement or upgrade measure assembly, the MEC Measure Assembly (SKU ME8098CA) delivers the precision engineering that separates match-grade ammunition from commercial-grade loads.