It sounds like it but chrono it to confirm that the velocity us low. Check inside the gun, clean and polish the hammer and springs. It will help consistency if you square the ends of the springs too. From factory there that bad the spring won't even stand on its end. This causes fluctuations in the velocity as it rotates. It sounds like the reg though.
Let your shooting do the talking.
It's not the aim and release that decided the shot, it's the preparations.