Used [b]BlackStar[/b] here in Houston, years ago on a 308 cal. Ruger M77VT, which I was planning to be my long range rifle.
Had the stainless-steel barrel cryo'd and electro-polished.
Rifle suffered from a stock twisted barrel, limiting it's actual long range use, (not the rifle's fault, but me, being too stupid to know that, no.1: a Rem 700 makes a beter platform and no. 2: that a custom barrel w/ fast twist is only real way to reach 1000 yards sub-minute), but the processing (cryo & electro-polish) of this particular rifle extended it's sub-MOA accuracy from 500 yards out to 700 yards. A definate improvement.
The real improvement tho, IMO, was that the electro-polishing removed all the burrs and rifle cleaned like a dream, that and the fact that cryo'ing was/is a definate way to extend the LIFE expectancy of a barrel.
My current LR rifle has a barrel cryo'd by Krieger and while I have no way to compare how it would be if it wasn't cryo'd, I definately believe it will benefit in the longer life aspect, and IS "worth the money"......
my 2cents,
Mike