OK guys Redding does NOT make a set of shellholders that are smaller/shorter than regular shellholders which are .125 nominal. The Redding Competition Shellholders are taller to size Less not more. Each Shellholder in the set of 5 is taller by an increment of .002. In other words the shellholders are in order .127, .129, .131, .133, .135 taller than a standard of .125. They are made to set a hard stop at cam over to size less.
They are a really great tool to fine tune your sizing to fit your chamber plus you can use the same die setting with more than one gun without having to readjust your die.
However they do not allow you to size more only Less. They simply keep you from pushing the case into the die as far as a standard shellholder allows.
The simple fix to the OPs problem is to shave a little off of the top of the shellholder. I have done this very successfully by turning the shellholder upside down onto a flat surface and using fine emory cloth. Go slow and check often to get to the sizing you need.