The Sauer 100 uses a standard, .30-06 length action, bolt and magazine for both long and short action (.308 length) cartridges. The rear of a short action magazine is simply filled with a plastic spacer to keep the cartridges forward in the magazine and in the proper place to feed into the chamber when the bolt is operated. This means the .30-06 (long) and .308 (short) actions are the same length and weight with the same bolt throw, so no weight savings are realized by ordering a short action caliber, and scope mounting options with shorter length scopes are more limited.
