I think all airguns have somewhat of a multi-stage, multi-directional shock wave. Springers are the worst. PCPs and pumps have the least. Nitro pistons CAN be just about perfect, but for a given charge of air, there is an ideal weight pellet for your barrel length. Too light and the piston will slam the end of the cylinder; too heavy and it'll bounce before the pellet moves. Nitros just eliminate springs that can bind, twist, or hang up some other way. Usually, even a springer will settle down, eventually, but it might take a few thousand shots to wear the new off. The shockwave problem will always be there, though. I put peep sights on mine, if I can find one that fits.