Chrome lining gives you about 10k more rounds before the barrel is shot out than a ss barrel. Wear rate from heavy use is the same.
I've got two ar that are high enough quality I consider precision bores both are ss barrels one I did the shoot clean shoot clean etc ritual the other I just took it and shot it. After initial cleanings of course. Both are able to turn in 1/4 moa groups at 100yds. If there is a diff tween a complicated cleaning breakin and not doing it I haven't seen quantifiable proof it helps other than opinion to date.
You can do the ritual or not it doesn't hurt anything one way or the other. If the barrel maker has a breakin procedure it can't hurt to follow it but the fact every high end maker has a different oppinion on how it's done and the why's of it and a different way to do it is proof to me that it really doesn't matter
I do highly recommend the jp bore cleaning guide whatever you do. Just an awesome tool for cleaning
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