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.
#6 Shellholder fits :
22 Remington Jet
5.6mm x 50 Rimmed
256 Winchester Magnum
357 Magnum
357 Remington Maximum
38 Smith & Wesson
38 Special
#6
Specifications
Manufacturer: RCBS
Manufacturer No : 09206
SKU : 16250
UPC : 076683092069
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.