Just got an empire sniper pump and when I got it out of the box, the pump pull was super smooth and snappy. The next day, I come back and it is horrible, it does not return all the way and is not smooth. I pulled out the bolt and just the pump handle is very smooth, then i just slid the bolt back and forth and it was smooth, but when i attach the bolt it was bad. Then today, it is back to how it was when I first got it. If it goes bad again, I need to know how to fix it. HELP!