Texan .308 Airgun by Airforce Airguns – Quick Chroney Test with 111gr Cast Bullets Posted on March 14, 2017 by rseher The Texan .308 with a 3000 psi fill using 111 gr. cast bullets I saw a velocity of over 1000fps airforce-texan-308-3000psi-111gr airforce-texan-308-3200psi-111gr