OperationBreak BarrelBeginner
When you cock the gun by breaking the barrel down (or pulling an underlever or sidelever), a heavy steel spring is compressed behind a piston. Pulling the trigger releases the spring, which slams the piston forward and compresses a column of air ahead of it. That compressed air rushes through a transfer port and pushes the pellet down the barrel. Because the piston moves before the pellet leaves, the gun has a unique double recoil pulse that demands proper technique.
Read full answer →OperationBreak BarrelBeginner
A gas piston replaces the coiled steel spring with a sealed cylinder of compressed gas, usually nitrogen. Cocking the gun further compresses that gas; releasing the trigger lets it expand and drive the piston forward. Compared to a coil spring, a gas piston cocks more linearly, has less vibration and twang, can be left cocked for hours without spring fatigue, and is less affected by cold weather. Coil springs are cheaper, more easily tuned by hobbyists, and replaceable; gas rams are usually replaced as a unit if they fail. Accuracy potential is similar.
Read full answer →TechniqueBreak BarrelBeginner
The pellet is still inside the barrel while the piston slams forward, so the gun moves a measurable amount during the shot cycle (lock times of 5+ milliseconds for spring guns, vs about 2-3 ms for centerfire rifles). Any inconsistency in how you hold or rest the gun changes where the muzzle is pointing when the pellet finally exits, which throws point of impact around. The fix is the artillery hold and consistent technique, not gripping the gun harder.
Read full answer →TechniqueBreak BarrelBeginner
The artillery hold is a deliberately loose, repeatable hold that lets the gun recoil freely, the way a field artillery piece sits in its carriage. Rest the forestock on an open, flat palm at the gun's balance point, keep fingers relaxed, hold the pistol grip lightly, and let the gun bounce on the shot. The point is being identical from shot to shot, not being floppy. The name was popularized by Tom Gaylord. Once mastered, group sizes typically shrink dramatically with the same gun and pellet.
Read full answer →CockingBreak BarrelBeginner
Cocking effort is the pounds of force needed to break the barrel and compress the spring, and it usually scales with power. Entry-level guns are around 18 to 25 pounds, magnum springers can exceed 35 to 45 pounds. Higher cocking effort makes the gun harder to shoot a lot, harder for younger or smaller shooters, and is correlated with harsher shot cycles. For most adults, 25 to 30 pounds is a comfortable upper limit for a session of hundreds of shots.
Read full answer →AccuracyBreak BarrelIntermediate
Barrel droop is when the barrel points slightly downward relative to the receiver where the scope is mounted, so even with the scope's elevation cranked all the way up, the gun shoots low. It is common on break barrels because the barrel pivots on a hinge and tolerances stack up. The fixes, in order of preference, are an adjustable scope mount such as the BKL adjustable, a droop-compensating one-piece mount, Burris Signature rings with offset inserts, or carefully shimming the rear ring. Avoid maxing out the scope's internal elevation, which causes the reticle to drift.
Read full answer →MaintenanceBreak BarrelBeginner
Without a pellet to push against, the piston slams forward unimpeded and the seal smashes into the end of the compression chamber at full speed. Repeated dry-firing can shatter the piston seal, break the spring, and crack the receiver in extreme cases. A few accidental dry-fires will not destroy the gun, but make it a habit not to dry-fire. Gas piston guns are slightly more tolerant but the same rule applies.
Read full answer →MaintenanceBreak BarrelIntermediate
Dieseling is the combustion of lubricating oil inside the compression chamber when the piston compresses air to roughly 2,000 degrees F per shot. A small amount is normal in many spring guns and even contributes a little energy. Heavy dieseling produces white smoke, sharp crack-like reports, and erratic velocity, and indicates too much oil or the wrong oil. Detonation (a louder bang) can damage seals and the spring. The fix is to run the gun until excess oil burns off and to use only manufacturer-recommended chamber lubes going forward.
Read full answer →MaintenanceBreak BarrelIntermediate
Use silicone chamber oil (high flashpoint) on the piston seal and breech seal, applied a drop or two every 1,000 shots or when the seal squeaks on cocking. Use a thin film of moly or lithium grease on the spring; avoid heavy tar greases that trap dust and feed dieseling. Never use petroleum-based oils (WD-40, 3-in-1, motor oil) inside the compression chamber of a modern springer with synthetic seals: they cause dieseling, swell or rot synthetic seals, and can detonate. RWS Chamber Lube and Pellgunoil are common safe choices.
Read full answer →
