If your shell holder doesn't securely grip the sell and firmly fit into the press during reloading, you're bound to have headspace and sizing problems. RCBS manufactures their shell holders to the industry's tightest tolerances, using only the finest steel.
Fits:
.218 Bee
.25-20 Winchester
.32-20 Winchester
Fits:
.218 Bee
.25-20 Winchester
.32-20 Winchester