I have a parder pump 12ga that when I rack a new shell it will jam up. what appears to be happening, is that the new shell is coming out of the tube before the spent shell can eject. Now what is really weird is that I can rack it slowly and it will eject the shells fine, but as soon as I try to rack it fast it will not eject. This happens with spent shells, and when I put new shells in it. For anyone who isnt familiar with these guns they are basically a copy of the rem. 870 so any advice from the 870, might help with this. Any help is much appreciated, couldnt happen at a better time. Dove season just opened up, and I missed quite a few due to this.