My good friend has a FN tactical rifle that is chrome lined. We went down to Frederickburg, VA to meet with people who test them. They claim no throat errosion within 15,000 rounds in 308Win. So I have kept close tabs on the throat length of my friends FN SPR A1 rifle. It hasn' t changed a bit in 500 rounds. Now my 300RUM, is a different story.

I figured someone would do this procedure for a 22-250 or the new 223 WSSM. Also, to boot, he gets no copper fouling at all. No brushes and no scrubbing. That would be outstanding for the Varmit shooters of the world.