Check and make sure the recoil lug is makeing contact like it should. Loose action screws after firing usually indicate a problem in this area and can cause fault with both the trigger and magazine. Most likely your scope base (if your using the one that came on the gun) is very soft material and will always give you problems. Check to see if your rings are riding up on the base slots. Replaceing with a steel unit will solve this.
Later, Brad
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