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**Mike Irwin** · April 17, 2014, 09:36 PM

Yes, peak operating pressure, which hasn't dropped all that much by the time the bullet clears the muzzle gap on a revolver.

"9mm has a high peak pressure because it has to do what something like .38 does with a much smaller case."

The 9mm does NOT do what the .38 Special does.

The ballistics are NOT similar.

9mm ballistics are far closer to .357 Magnum ballistics.

April 17, 2014, 09:36 PM	#101
Mike Irwin Staff Join Date: April 13, 2000 Location: Northern Virginia Posts: 41,389	Yes, peak operating pressure, which hasn't dropped all that much by the time the bullet clears the muzzle gap on a revolver. "9mm has a high peak pressure because it has to do what something like .38 does with a much smaller case." The 9mm does NOT do what the .38 Special does. The ballistics are NOT similar. 9mm ballistics are far closer to .357 Magnum ballistics. __________________ "The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza Baby Jesus cries when the fat redneck doesn't have military-grade firepower.