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Old February 1, 2013, 07:29 AM   #15
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Join Date: April 4, 2006
Location: Ohio
Posts: 1,277
Depends on the gun. A smaller gun with a shorter barrel I would lean towards a lighter bullet to get the velocity up enough to expand.
9mm velocites are not effected much by barrel length. I've generally seen about a 100 fps difference between a 3.5" barrel and a 5" barrel. The modern bullet designs of today have a much wider upset velocity range then the difference you will see in fps from using a shorter barrel. Mind you this is just talking about 9mm. Other calibers have their own characteristics.
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