Bolt action rifles tend to be more accurate than semiautos. Fired cases from them can be reloaded dozens of times. These are better for longer barrels when heavier bullets are desired for longer ranges.
But a properly rebuilt AR10 semiauto will be 90% as accurate as the most accurate bolt action. But fired cases from them can only be reloaded 2 or 3 times; maybe 4 times if done exactly right.
US Navy Distinguished Marksman Badge 153
Former US Navy & Palma Rifle Team Member
NRA High Power Master & Long Range High Master
NRA Smallbore Prone Master