I thought you guys might find this interesting. I made this chart today because I had always wanted to see the best load comparison. These are the hottest *within max pressure* loads for each individual cartridge. So you can see a true comparison of all the handgun cartridges. This is based off of Energy delivery as the primary, but I have included the bullet weight, velocity, and the power factor as well. I found it pretty interesting.
***UPDATED 01/31/13 - Corrected both .22LR & .22WMR for barrel length. Added 9x18,5.7x28,.327 Federal, and .45GAP by request.
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