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My largo reloads will crack in kimber 38 super chamber but do fine in a destroyer. AA#5 would be a good one to start with. Don't be afraid of 147 grain bullets in the largo as the case isn't as thick as a 9x23 which is too thick near the base for the bullets to seat right as that does run at much higher pressures. You should be good with any 9mm luger data and might bump it a bit if you have a chronograph to guide you using 38 super data as a top reference.
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