Get off the Internet and go to the library. Study every thing written about Gen J. Hatcher's (Hatcher's Notebook is the best you'll find)
You mentioned
"Bore should be Chromed, 6 Grooves, 1-7" RH Twist, with a Direct Gas System, Locking Bolt, and direct impingment system"
It's all there in Hatcher's Notebook. Gen Hatcher spent his life in the the US Army Ordnance Dept. from the early 1900s to the 50s. He finished his career as a Tech. Adviser for the NRA's American Rifleman.
Read all you can, but know the author. Before you concentrate on an author find out what he did, not what he read, or heard about. Using Hatcher as an example again, he shot our our Rifle and Pistol Teams. He developed the machine gun schools for our army when we first started using machine guns.
When you find a teacher, find out what they did, not just the schools they went to, but what they did with their instructions.
Go the the CMP bookstore and read everything they put out by the Army Marksmanship Unit. Best shooters in the world. Their Sniper school was used to train the instructors for the marines, FBI, Secret Service, Army, Air Force and several police department sniper schools.
The Seals still use them to teach the Marksmanship portion of the Seal Sniper Schools.
The CMP was started in 1905 (then it was called the Division of Civilian Marksmanship) by congress to instruct the American Citizen in marksmanship. It's still under charter to do just that.
Bryan Litz of Berger Bullets wrote a dern good book, Applied Ballistics for Long Range Shooting. It's not a technical as it looks, study it.
Read every reloading manual you can, whether you reload or not.
Study every thing you can get your hands on regarding the mental aspects of marksmanship.
Read about the old guys, besides Hatcher, Phip Sharp, Elmer Keith, Jack O'Connor, Townsend Whalen, Bill Jordon. (To Name a Few). These guys were there. They got the t-shirts, they know what they were talking about.
The best book you'll ever find, (and its hard to find) is Capt Edward Lewis' "Military and Sporting Rifle Shooting.
Good and read the Article "Secrets of the Huston Warehouse". Goggle and read "The Bullet's Flight, from powder to Target" By Dr. Mann. Goggle the web sights for any of the Military Manuals.
Shoot, get in on every NRA Shooting Course you can. Attend the CMP GSM Clinics. Attend Appleseed Events.
Find local shooting events and compete in every one possible.
Remember, regardless what some one tells you, Trust but Verify. Lots of people will tell you to do this or that, ask them if they did it, what is their accomplishments.
Again, don't discount your local library, you'll find much more accurate information then you'll fnd on the Internet.