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Shoney · May 14, 2007, 12:54 PM

Do 9mm Luger cases need to be trimmed? As has been clearly stated - -NO! They actually get shorter over many sucessive loadings.

Trimming of cases is primarily a rifle case proceedure. The repeated shooting and sizing of bottleneck cases will cause the brass to stretch.

Various rifle cases have min and max trim lengths listed in most loading manuals. The amount of stretch per case varies because of many factors, and therefore the number of loadings between trimming varies. Exceeding the max case length in rifles will cause either hard chambering or failure of bolt to close on the cartridge.

May 14, 2007, 12:54 PM	#6
Shoney Senior Member Join Date: February 21, 2002 Location: Transplanted from Montana Posts: 2,311	Do 9mm Luger cases need to be trimmed? As has been clearly stated - -NO! They actually get shorter over many sucessive loadings. Trimming of cases is primarily a rifle case proceedure. The repeated shooting and sizing of bottleneck cases will cause the brass to stretch. Various rifle cases have min and max trim lengths listed in most loading manuals. The amount of stretch per case varies because of many factors, and therefore the number of loadings between trimming varies. Exceeding the max case length in rifles will cause either hard chambering or failure of bolt to close on the cartridge. __________________ I pledge allegiance to the Flag - - -, and to the Republic for which it stands….Our Forefathers were brilliant for giving us a Republic, not a democracy! Do you know the difference??? and WHY?http://www.wallbuilders.com/LIBissue...les.asp?id=111