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Jim Watson · April 3, 2013, 03:51 PM

Gee, the hard chrome platers' sites I checked claim a buildup of only .0002" to .0005" per side and only use a nickel strike on aluminum, not steel.

Further, I had an old article describing a chrome lined 5.56 barrel which was so rough as to foul badly. The owner had the plating stripped and lapped the bare steel bore. So he then had a .225" barrel instead of .224". No four thou buildup there.

I think Unclenick is describing decorative or "bumper" chrome, not the industrial hard chrome used by knowledgeable gun shops. And perhaps used as a horrible example by nitriders.

Nitride treating a used barrel from a surplus kit brings on some problems, so I would talk before I bought.

April 3, 2013, 03:51 PM	#5
Jim Watson Senior Member Join Date: October 25, 2001 Location: Alabama Posts: 18,541	Gee, the hard chrome platers' sites I checked claim a buildup of only .0002" to .0005" per side and only use a nickel strike on aluminum, not steel. Further, I had an old article describing a chrome lined 5.56 barrel which was so rough as to foul badly. The owner had the plating stripped and lapped the bare steel bore. So he then had a .225" barrel instead of .224". No four thou buildup there. I think Unclenick is describing decorative or "bumper" chrome, not the industrial hard chrome used by knowledgeable gun shops. And perhaps used as a horrible example by nitriders. Nitride treating a used barrel from a surplus kit brings on some problems, so I would talk before I bought. Last edited by Jim Watson; April 3, 2013 at 04:18 PM.