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.
#10 Shellholder fits :
17 Remington
221 Remington Fire Ball
222 Remington
222 Remington Magnum
223 Remington (5.56mm)
7mm Thompson/Center Ugalde
380 Auto Pistol
#10
Specifications
Manufacturer: RCBS
Manufacturer No : 09210
SKU : 16296
UPC : 076683092106
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.