A major part of handloading for accuracy is in case prep and bullet seating. Unfortunately, a good part of that is not applicable to auto loading rifles. "Stretching" the round, what we call seating to the lands, or bullet runout, is not going to be an option, nor is fine tuning the case size. You can still do some things to help tighten groups, such as insure the concentricity of your cases and the uniformity shoulder, case length, and cartridge overall length. You can uniform the primer pockets and insure that the flash hole is free of burrs. You can sort your brass by weight, brand, and lot# and also the bullets.
You can weigh and drop each powder charge individually, using mfgr data. You can use match grade bullets and primers. There is a lot you can do, but you will never get long range varmint grade bolt accuracy out of an auto loader. I load for both. They both have their attractions and strengths and weaknesses.
A good reference for accurizing you, your rfile, and your ammo can be found on
www.snipercountry.com and on
www.gunzone.com