Expanding Gas Checks for an Oversized Bullet Shank
Using a LEE Universal Case Flaring tool as a Gas Check Expander
Used my new LEE GC expander today (not by LEE). It only works on 30cal that I know of. I have one mould with a slightly oversize GC shank making it difficult to install checks.
I looked around at all the stuff I have accumulated and came up with the following. I used a LEE universal case flaring die with the large expander on the bottom and small one on top.
I then used the push pin from a LEE 30cal boolit sizer perching a GC on top. Running it up in my press the tapered tip of the large universal expander die expanded the check to a perfect slip on size and not a one stuck on the expander. It didn’t take long at all to expand a hundred checks.
You can also try one of these:
It might help as well and works with all calibers. It puts a little chamfer on the base.