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RickB · June 2, 2004, 12:35 PM

So, a factory .30 Luger barrel dropped in, other than the muzzle OD issue? How tough would it be to re-line a 9mm barrel to .30, instead? I thought the factory .30 slide was extensively lightened, compared to the 9? All those isssues aside, I have a 1920 Commercial Luger, and my load development procedure was identical to yours; I loaded up until the gun functioned, then added enough for a safety margin. I found my gun, loaded with 85-90 grain bullets, would function erratically until velocities got to 1100fps, then it ran perfectly. The groove diameter is .3095", so I've been running lubed .311"-312" bullets (85gr. Hornady XTP is my favorite) through a Lee .309" sizing die, and getting a perfect Luger bullet.

June 2, 2004, 12:35 PM	#3
RickB Senior Member Join Date: March 1, 2000 Location: Boise, ID Posts: 8,559	So, a factory .30 Luger barrel dropped in, other than the muzzle OD issue? How tough would it be to re-line a 9mm barrel to .30, instead? I thought the factory .30 slide was extensively lightened, compared to the 9? All those isssues aside, I have a 1920 Commercial Luger, and my load development procedure was identical to yours; I loaded up until the gun functioned, then added enough for a safety margin. I found my gun, loaded with 85-90 grain bullets, would function erratically until velocities got to 1100fps, then it ran perfectly. The groove diameter is .3095", so I've been running lubed .311"-312" bullets (85gr. Hornady XTP is my favorite) through a Lee .309" sizing die, and getting a perfect Luger bullet.