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Old 01-07-2010, 11:11 AM   #23 (permalink)
Old gear!
Join Date: Oct 2007
Location: Dallas

I've seen porting significantly improve accuracy, actually- it gets rid of those 'outlier' shots in my experiences. And, while on a PROPERLY tuned gun, you only need an 8" unported barrel (give or take a few inches based on the gun), if you tune things wrong, the porting and extra length will help release the excess gas in a more consistent manner. The 'safest' bet, for a really bad gun, is a two-step, heavily ported barrel in a tight bore- the gas will accelerate it down the original length the same way each time, then all the extra is vented quickly, be it a ton of extra, or just a little bit.
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