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Designed for factory loaded ammunition, Microgroove barrels have a reputation for accuracy problems with centerfire ammunition handloaded with cast lead bullets due to the increased bore diameter generated by the shallow grooves.
The use of oversized cast bullets greatly solves this problem, restoring accuracy with cast bullet handloads to levels seen from Ballard rifled barrels.
This change was marketed in the 1954 Marlin catalog, as having numerous advantages that this new form of rifling had, including better accuracy, ease of cleaning, elimination of gas leakage, higher velocities and lower chamber pressures.
The catalog also claimed that Microgroove rifling did not distort the bullet jacket as deeply as Ballard rifling hence improving accuracy with jacketed bullets at standard velocity.
Marlin Firearms was founded in the 1870s by John Marlin.
Marlin produced a large assortment of firearms such as lever-action rifles, pump-action shotguns and single shot rifles.
This helped Marlin capture more market share as American shooters came to rely more and more on optics.Significant variations of many of these rifles have usually also been manufactured.