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Message: <blockquote data-quote="diggler1833" data-source="post: 3838449" data-attributes="member: 48072">I remember reading an article about crazy velocity swings in the .45 Colt, which apparently was completely dependent on how the revolver was handled (with the cartridge in it) before it was fired.  You'll have to forgive my fading memory, but I think there was a significant velocity loss when the revolver was kept level...and the powder was presumed to be laying much more loosely in the bottom of the case.  That was vs. the revolver being tilted upward to settle the powder closer to the primer before it was fired.I'm going to see if I can find that article online.   It would definitely support his post...but rifle cartridges usually have a lot more case volume used up with a powder charge.</blockquote>