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Posted: 4/2/2006 10:39:10 PM EDT
When buying defense/performance ammunition, are the velocity numbers stated from the manufactuer from a 4" barrel? I have an XD40 tactical and just ordered some 155gr .40 s&w TAP, will I actually be getting "more bang for my buck" ?
Link Posted: 4/3/2006 7:22:24 PM EDT
Yes No Maybe. The chamber specs, riffling etc can all make a difference. I've seen data where the same load was fired from a half dozen identical (same make model) firearm and seen over 200 fps between the fastest and slowest averages.

That being said, on average you should see some velocity gain with a 5 vs a 4" barrel.
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