124 Grain vs. 124 Grain NATO Ammunition
Why the Difference Matters — Especially in the HK MP5 After decades of ammunition testing—across pistols, subguns, suppressors, and pressure instrumentation—one lesson comes up repeatedly: Not all “124 grain” 9×19mm ammunition is the same. On paper, 124 grain and 124 grain NATO sound identical. Same bullet weight, same caliber, same cartridge. In reality, they are […]
