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30X357 magnum
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04-17-2018, 03:06 AM
squirrel_slayer
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Join Date: Jan 2013
Posts: 510
Think they call that one the 17 super jet?(17 jet was the magnum length one) you should be able to get over 4k ft/sec from the 20gr bullets as it has more capacity than the 17 fireball/mk4. but then again pressure may be a touch less.
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