I have a CZ75 with about 3500 rds of cast through it. It has never seen jacketed. I think the 9mm is a high pressure round that doesn't have the reputation for accuracy because of that pressure involved. I know there are a lot of stories out there about the 45 acp as a target gun which I believe is due to the lower pressures. I would go with the lowest load that functions the slide without sooting. Lube will play a lot with accuracy and a commercial one will probably not get you where you can go IMO.

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Front sight and squeeze