My abolt required a new spring as well as honing and polishing to get to 3lbs...this seems to be the norm for most I have talked with. 700'sIMO are the easiest factory trigger to adjust(the savage accutrigger excluded of course).
My experiences with adjusting the triggers on both has beenthat my own a-bolt required a replacement spring andmy 700s were all easily adjustable with no parts required.