Anyone had problems with certain pellets being hard to load? I mainly use Barracuda 8s and JSB Heavies and until recently I have had no problems with either but all of a sudden the 8s are very notchy and hard to load, the only thing that I have done different is to change the pellet probe O rings and yes they are the correct size and there is little chance of getting the alignment wrong with the mounting and no I haven't used too much force, and It's also not any looser than intended, yet the JSB heavies have no problems, and they are pretty much the same dimensions.