ORIGINAL: double_lung

After I put in the primer, if I dont "slam" the thing closed sometimes I cant get the hammer to pull back. Anyone ever had a problem with this? It has the quick out breech plug, and appears to be going in correctly...I dont know what might be going on. If I slam it closed, it's fine. Happened to me last year on a nice buck, couldnt get the hammer back. Any suggestions?