I am sure this question has been asked before but after looking back through some posts don't seem to be able to find the answers I am looking for. Basically what do you all think is the best length of barrel for a 12flb pcp rifle in order to achieve maxium velocity in .22 caliber? Pretty sure it all hinges on caliber/pressure but is there a way to calculate this using all relevant info?, do longer barrels allow built up pressure to propell the pellet at higher speeds?. Also when would it be fitting to deem a barrel too long or too short for target/hunting purposes? whats everyones general "ru