I am loading two new calibers, .38 ACP and 9mm Largo. I shot some test loads yesterday. I had success with the .38 ACP load, but my Largo load was too weak to cycle the action. Both cartridges were loaded with RCBS .38 Super dies.
Here is the .38 ACP. It is a Colt 1902 Military. It is loaded with 4.5 grains of HP-38, 125 grain Sierra FMJ in Starline .38 Super cases. Worked brilliantly.
Had less success with the Largo. Here I was also using the 125 Sierra over HP-38 in Starline Largo brass. I started with 4.7 and 5.1, but both were too light to reliably cycle the Bergmann. I'm going to increase the charge to 5.4 grains and test. Max is 5.9 grains, so I still have some room.
From left to right: 124 9mm Luger, 125 .38 ACP, 125 9mm Largo.
Here is the .38 ACP. It is a Colt 1902 Military. It is loaded with 4.5 grains of HP-38, 125 grain Sierra FMJ in Starline .38 Super cases. Worked brilliantly.

Had less success with the Largo. Here I was also using the 125 Sierra over HP-38 in Starline Largo brass. I started with 4.7 and 5.1, but both were too light to reliably cycle the Bergmann. I'm going to increase the charge to 5.4 grains and test. Max is 5.9 grains, so I still have some room.

From left to right: 124 9mm Luger, 125 .38 ACP, 125 9mm Largo.

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