View Single Post
Old 03-23-2007, 04:43 AM
Pushkin Pushkin is offline
Join Date: Oct 1999
Location: Belfast Northern Ireland
Posts: 6,610
Originally Posted by Stranger On A Train
It would probably be something measurable, but I wouldn't expect much. Air compresses readily, and the difference in pressure between the ambient atmosphere in front of the bullet and the propellant gases behind it is huge. I'd guess the difference to be no more than a few tens of fps, if that; less than the typical variation from round to round.

So would an automatic rifle with a gas operated mechanism suffer at all?