That changed when Savage introduced the A17, a semiauto chambered in .17 HMR, earlier this year. The Savage A17 has proven to be functional and safe, with an affordable price tag—suggested retail price is $465. Savage made it work by using what is called a "delayed blow-back" action. When the action closes on a loaded cartridge, a bar in the bolt is pushed up to fit into a slot in the receiver to lock everything in place. This bar has an angled cut on its back—the load bearing side. When the cartridge fires, pressure pushes back on the bolt face until this angled lock cams down out of the slot in the receiver. This delays the action from opening just long enough for the bore pressure to drop to a safe level. All this allows the .17 HMR to work in a semiauto rifle. It is simple, safe, and very effective.