Hey fellas I am rebuilding a crossman 2200 multi pump airgun. So far ive rebuilt the valve seals, cleaned all parts, lubed the tube and all seals and put back together. I was able to take about 20 shots and all were extremely accurate and tube was holding air. Then something must have happened around the 20th shot because now every time I pump air comes out the barrel. I am about to open her up again but if anyone knows what causes this problem it would help me out and save me some troubleshooting. Ty
