I have S&W 1911s both with the Briley bushing and without. I'm not a good enough shooter to see any difference - in fact, my older (1989-vintage) PC gun without the Briley bushing outshoots the one with the sperical bushing. And I'm one of those who grouse and moan about the bushing being a PITA to remove and reinstall so there's another reason why, to me, they aren't magical.
Ed
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