LugerForum Discussion Forums - View Single Post

Doubs · 12-04-2003, 11:29 PM

<blockquote>quote:<hr />Originally posted by Doug G.:
Out of curiosity, how hard would it be to convert a 9mm to .38 Super. Other than the bore diameter being a few thousands different. I loaded a standard mag with some supers, they sat a bit more upright. But they did feed properly.
Comments.<hr /></blockquote>There should be NO difference in bore diameter between 9mm & .38 Super.... both use the same .355" diameter bullets. It would also be easier to have the pistol converted to 9mm Largo or 9x23mm. The case is rimless and the same rim size as the Luger cartridge. 9x21mm would likely work even better.

While the .38 Super cartridge was a good idea, the semi-rim was not. The cartridge headspaced on the rim causing accuracy to suffer badly; mostly due to different thicknesses of rims. Newer .38 Super chambers are set for headspacing on the case mouth and accuracy is generally better than in the older guns.

12-04-2003, 11:29 PM	#5
Doubs User Join Date: Jun 2002 Location: Byron, Georgia Posts: 1,736 Thanks: 819 Thanked 1,769 Times in 586 Posts	</font><blockquote><font size="1" face="Verdana,Tahoma,Arial,Helvetica,Geneva">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Originally posted by Doug G.: <strong>Out of curiosity, how hard would it be to convert a 9mm to .38 Super. Other than the bore diameter being a few thousands different. I loaded a standard mag with some supers, they sat a bit more upright. But they did feed properly. Comments.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">There should be NO difference in bore diameter between 9mm & .38 Super.... both use the same .355" diameter bullets. It would also be easier to have the pistol converted to 9mm Largo or 9x23mm. The case is rimless and the same rim size as the Luger cartridge. 9x21mm would likely work even better. While the .38 Super cartridge was a good idea, the semi-rim was not. The cartridge headspaced on the rim causing accuracy to suffer badly; mostly due to different thicknesses of rims. Newer .38 Super chambers are set for headspacing on the case mouth and accuracy is generally better than in the older guns.