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.
#8 Shellholder fits :
45 Auto Rim
#8
Specifications
Manufacturer: RCBS
Manufacturer No : 09208
SKU : 16252
UPC : 076683092083
Warranty : If any of your RCBS equipment breaks or doesn't work, they will fix it or replace it. No time limit. No questions asked.