I found this real interesting! maybe after I put my new gas piston rifle through it's paces i'll chop my springer for indoors work this also could explain why the trail np pistol hits so hard if np airguns share the same physics. "Cardew determined optimum spring gun barrel length A spring gun gets all of its “push” in the first few inches of the barrel. Gerald Cardew pointed out in The Airgun from Trigger to Target that only the first six inches of the barrel is needed for a spring gun to achieve maximum velocity. His experiments were conducted in the mid-1970s. Although technology has advanced since then, today’s spring-piston guns probably don’t use more than the first 10 inches of barrel for top velocity. After that, the pellet coasts the rest of the way. Yes, friction with the bore slows the pellet somewhat, but the amount is so small that it doesn’t amount to anything. Spring gun barrels are made longer than 10 inches because they are used as levers, as in breakbarrels. And, on all rifles, a shorter barrel just doesn’t look right. That’s why the underlever TX 200 from Air Arms hides its nine-inch barrel inside a longer shroud that also muffles the sound of the shot." from this site Is airgun barrel length important? | Air gun blog - Pyramyd Air Report what do you guys think?