I have a T/C Pro Hunter and have been shooting Easy Glide 250 grain Shock Waves on top of 3-50 grain 777 pellets.

The problem that I am having is that I have put a piece of tape around the ram rod to show the seating depth and to make sure it is consistent. After a quick swab for the second round the ram rod comes up about 1" short of seating markon the ram rod. I know everyone is going to say this is because of the 777 crud ring, that is why I tried Pyrodex RS and it does the exact same thing. I have also tried the 777 primers and have taken the breech plug out and pushed the Easy Glide Shock Wave down a clean barrel only to have it get hard to push when it nears the tape mark on the ram rod. The gun has near 75 shots through it and there in now plastic build up in the breach of the gun. I am having to shoot CVA Power Belts to get it to load and shoot consistently. I have the new Nikon Omega scope mounted on the gun and the reason I bought the gun was to shoot magnum 150 grain charges with a 250 grain sabot and get achieve the accuracy the scope and the gun were made for.

Is there any way that the barrel could have a tight spot near the breech of the gun which is causing my loading problems?