Deep Cryogenics processing significantly increases rifle accuracy by relieving residual metal stresses in the barrel

The deep cryogenic process for rifle barrels controlled with dry thermal treatment. The material is cooled up to -310°F held for a day then raised to +310°F and slowly returned to room temperature. The dry thermal process prevents rifle barrel from thermal shock.
Source: http://www.300below.com/press/magazine-articles/swat.html