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Old November 24, 2012, 10:10 PM   #19
Senior Member
Join Date: November 4, 2012
Location: idaho
Posts: 163
I get that there is more powder behind a 357, but with a shorter barrel, that powder doesn't have the opportunity to deliver the punch it could with a longer barrel (rifle cartridges shot via pistols being the prime example). As I understand it some rounds are manufactured with faster burning powder to work better with shorter barrels. All the same, they can really only make powder so "hot" and still safe, so at some point, as the barrel gets shorter, the larger cartridge must provide only diminishing and marginal returns with some of that powder not burning before the bullet exits the barrel and not contributing to the bullet's velocity...right? I was never trying to indicate a 9 mm has anywhere near the powder capacity of a 357, it doesn't, but as the barrel gets shorter, it stands to reason that the extra powder in a 357 delivers less punch...OR maybe the powder wizards have it worked out so that it does, I am still learning.
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