Snow is deep- I just had to shoot the Nitrided 300 RUM

[dmack]

Thanks for the info Neal!
One question, 42R, are you referring to Rockwell "C" scale?

[358Hammer]

Yes- sorry Rockwell C-scale.

The rockwell C-scale hardness of Ferratic Nitride is 68-70 after treatment and penetration is .003-.004

I am currently at 75 rounds with the 6.5 WSM and there isn't any sign of errosion. I am shooting nothing but Barnes 120's and Nosler 130's. Velocities are 3350 and above.
Neal

[762X51]

You got me curious so I did a little research and found a very informative site that describes the process. It is well worth the short read...

http://firearmshistory.blogspot.com/2010/08/metal-treatments-ferritic.html