Precision machined from solid steel and heat-treated to perform flawlessly. Wide mouth and rounded edge at the opening allow smoother case insertion. #1. Fits: 22-250 Rem, 5.6x57, .243 Win, .25-06 Rem, 257 Roberts, .270 Win, 280 Rem, 7mm-08, 7x57 Mauser, 30-06, 308 Win, 8x57 Mauser, 338 Federal, 338-06, 35 Whelen, and more. For a complete list visit Hornady's website.