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"Match grade" frequently refers to firearm parts and ammunition that are suitable for a competitive match. Sometimes, it also refers to other devices and parts that are made with high precision in mind.
Description
In firearms, the term is used to refer to ammunition and gun parts that are designed and manufactured in such a way that they have a relatively narrow tolerance and high level of accuracy. In addition to its use in shooting sports, match grade equipment is often employed by military and law enforcement sharpshooters.
Thus, many gun manufacturers use the term "match grade" to describe their products. For instance, the Heckler & Koch Mark 23 weapons system is considered so specifically tooled for combat that it is "match grade", one primary reason that the pistol and its components were selected by the USSOCOM for service. Also, the XDM ("m" standing for "match") features components that were more advanced than those of the regular XD pistol, such as sights and the barrel, which are deemed "match grade". The magazines have extended capacities for target or combat shooting and the slide also has a more durable melonite finish for government work. SIG-Sauer has also released a line of their first ever self-defense ammunition, Elite Performance Ammunition, which they deem to be "match grade", for increased performance and reliability.
Manufacturing match grade ammunition and other parts requires extremely tight tolerances and quality control. It is not unusual for match-grade ammo and parts to cost ten times more than comparable non "match" equivalents, owing both to the increased labor expended in creation and much more rigorous testing. Match grade ammunition is often subjected to higher randomized testing to increase the statistical likelihood of detecting a dud round. Match grade components are often selected by testing the performance of multiple, identically configured firearms and then eliminating those that don't perform to expectation.