So i picked up a 2300 that's been heavily modified. Has safpac,custom clip breech,power adjuster stock longer barrel. So I filled it to 1800-2000 psi tried 1st shot and it sounded like it used a crazy amount of air it pushed the probe back and the thing in this breech that gets air to the pellet. I had hammer spring screw backed way out. New to these modded Crosman just looking for help thanks