The bolt body on their short actions is the riding diameter instead of bolt lugs. This provides a very smooth ride. Bolt face ring the same distance at the action face allows gunsmiths to set the distance for ease of interchangeable barrels. This allows shooters the ability to swap barrels without a gunsmith or gauges. The floating bolt head may be changed with ease. Barrel and bolt head swaps allow easy transition of calibers by the shooter with a vice and torque wrench. 90 degree Sako style extractor eliminates the concern of stuck cases or rounds striking the windage knob on large scopes. The double plunger extractors guarantee ejection every time. Their customer service is top notch!