I've never had a positive experience with 1911s and steel cased ammo.
Other guns may run the stuff fine, but I don't run it in my 1911s. Ain't gonna feed a Ferrari regular unleaded.
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I endurance raced a v6 fiero with a Muncie 4-speed at Road Atlanta in a 14 hour crap can race that had Randy Pobst among other pros in attendance. It was twitchy AF but man that thing was tough.