The M1a from Springfield armory is a fantastic weapon. I had mine accurized years ago with the national match package consisting of glass bedding, bored flash hider, welded shut grenade launch system, and trigger job. It has a standard weight barrel not a heavy barrel but will shoot 5 shots into 3/4 of an inch all day long and shoots many 1/2 inch 3 shot groups. It works with any type of ammo including low power lead cast bullet loads. It is my favorite military rifle. The most accurate and most reliable weapon I have ever owned, I cannot praise it highly enough. Remember one thing if you feed any gun junk ammo ( military surplus) expect less than stellar accuracy. If you want a real tack driving load the load that was very popular with national match shooters about 15 years ago was 40.5 grains of dupont 4895 powder with a Sierra 168 grain match bullet. The load shot sub 1/2 inch groups out of my buddies remington 700 custom heavy barrel with a 2 ounce Jewell trigger. I have also used it in my M1a and a heavy barrel Wichester Bolt gun. If your gun doesn't shoot with this load it will probably never shoot with anything else either. W.R.