The melonite coating provides a thinner surface than chrome-lining, so bore friction is reduced for better accuracy. In addition, melonite is harder than chrome-lining providing a longer wear life.

Why is a chrome lined barrel better?

While chrome lining offers superior corrosion resistance to various external weather conditions, it also serves to significantly reduce throat erosion, allowing shooters to enjoy sub-MOA accuracy potential for as much as 20,000 rounds of normal use with factory match ammunition.

Do chrome lined barrels last longer?

Hard chrome-lining the bore protects the leade and rifling with a thin coat of heat and pressure resistant chrome. This greatly extends barrel life in rifles that are fired for prolonged periods in full-auto or rapid fire semiautomatic modes by preventing damage to the leade and rifling.