John,
Load one dummy round with NO powder and NO primer. Seat and taper crimp as normal. Measure OAL and try to chamber in your gun. If it won't chamber seat it deeper, measure OAL and try to chamber it. Repeat until the dummy seats. Then tell us what the OAL is. I'm sure some one who loads 9mm can then tell you if the OAL is acceptable or excessively short.
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