I have had this done to several of my personal rifles - as well as using a lot of Krieger barrels for customers, which are Cryo Frozen twice before I ever receive them. The frozen barrels usually shoot a little better - some shoot a lot better - and always clean easier. Best of all, they last longer - maybe as much as 50% - before the throat is gone and they need to be rebarreled. As a bonus, they machinenicely- the threads and the chamber cut very smoothly and leave a nice surface finish.