Quick Answer
Barrel length affects .22 WMR accuracy, particularly at longer ranges. A shorter barrel may lose accuracy at 50 yards or more due to increased barrel harmonics. However, a longer barrel can improve accuracy but may also increase weight and recoil.
Barrel Length Considerations
When choosing a .22 WMR rifle, the barrel length should be selected based on the intended use. For hunting predators at close to medium ranges (0-50 yards), a shorter barrel length (16-18 inches) may be sufficient. At longer ranges (50-100 yards), a longer barrel (20-22 inches) is recommended to reduce barrel harmonics and improve accuracy.
Accuracy Testing Results
Studies conducted by the National Rifle Association (NRA) and the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) have shown that .22 WMR rifles with barrel lengths between 20-22 inches can achieve consistent accuracy at 50-100 yards. In one study, a .22 WMR rifle with a 20-inch barrel achieved a 5-shot group size of 1.5 inches at 50 yards using a high-quality scope and ammunition.
Practical Considerations
When choosing a .22 WMR rifle, consider the weight and recoil of the firearm. A longer barrel may increase the weight and recoil of the rifle, making it less comfortable to shoot. Additionally, a longer barrel may require a more powerful scope to compensate for the increased bullet drop. Shooters should balance the need for accuracy with the practical considerations of weight and recoil.
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