anymanusa:
I think that Matt304 best outlined what you will need for that kind of accuracy. There are plenty of great answers and information in this thread--but the plain, hard truth is this: You WILL pay, and pay handsomely, for a rifle capable of the precision you have noted.
Many, many rifles are capable of shooting 1" or even under at 100 yards. Accuracy in a rifle depends on removing as many variables as you can--in the arm, the ammunition, and the glass.
You can almost bet your bottom dollar that you will NOT find accuracy like this off the shelf. There are some rifles that will deliver, but get out the checkbook and have the defibrillator ready.
If you want, you can have a rifle built that will deliver sub-MOA 1000 yard accuracy. Here are some of the things you will have to get:
1. First, the heart of the rifle--the action. You can take a good Remington, Winchester, Savage or what-have-you, have the action worked over by a COMPETENT machinist/gunsmith who can true and blueprint the action. All slop must be removed from the bolt, and the boltface must be perpendicular and perfectly square to the chamber, with 100% contact upon locking along all surfaces. You can also purchase an action approaching these standards off the shelf from BAT Machining, Kelbly (makers of the Stolle actions), Nesika Bay or others. I have heard some pretty good reports about the new Savage precision actions, too.
2. Your barrel must compliment the action well. Mounting, indexing, timing or the barrel MUST be perfect--or as close as a human can make it. The bore must be smooth with a good clean internal finish. You will pay for a good barrel because of the work that goes into it. All of the well known barrel makers--Douglas, Hart, Shilen, McGowen, Obermeyer, Kreiger to name a few--make premium barrels for precision shooting. Of these, perhaps the two go-to barrels for the precision crowd are Obermeyer and Kreiger--the only two I know of that still do single-point cut rifling.
3. Now to glass. You will NOT see the best performance with a bargain scope. Period. There are many scopes that will do the job and 100, 200, even 300 yards. But when you're talking about range and accuracy, quality will win every time. Believe it or not, while Leupold scopes are excellent in quality, they are on the LOW end of the scale when you're talking about long range glass! The ones you will see most often on the long range lines are Nightforce--both the benchrest and the NXS, the excellent Zeiss Diavari lines, Schmidt und Bender, and perhaps a US Optics here and there.
4. Be prepared to spend good coin on the stock, too. The stock must fit you AND the rifle. Lots of precision shooters like McMillan stocks--but right now they're about 8 months backlogged. And, you'll pay to have the stock mounted RIGHT, too.
5. The most important part about precision shooting, though, is not something you can buy--it's patience and meticulous attention to detail. You MUST know EXACTLY what your rifle is going to do, every time you pull the trigger. You MUST accept the fact that your rifle is NOT going to maintain that gilt-edged accuracy forever for extreme long range. Depending on the load, caliber, powder used, bullet used, how fast you shoot, and even how you CLEAN the barrel, you must be willing to change that barrel.
And don't be fooled--cleaning is a VERY important part of precision shooting. For a rifle capable of the accuracy you want, remember this well--it is ENTIRELY possible to RUIN your rifle in ONE session of reckless cleaning! This is a fact, friend. You will spend about enough money to buy a good handgun in getting the proper cleaning equipment for this rifle.
As far as barrel changes go, I know benchrest shooters who actually carry TWO spare barrels with them to the range. One is already on the rifle--this is the warm-up barrel to practice with. The match barrels are in their carriers--and these shooters have the tools with them to CHANGE THEIR BARRELS, AT THE BENCH!!
6. As long as we're on the subject of anal retention
, you WILL be reloading--simply because NO ammunition off a commercial line will deliver the accuracy you want--not even the excellent Federal Gold Medal Match. Your barrel will be tight chambered to EXACTLY fit your cartridges. Reloading for a precision rifle involves segregating the cases, sizing and trimming the cases, neck-turning and possibly inside reaming, weighing the cases and marking the bases for a proper index.
You will also either purchase your bullets or swage them yourself. You will be weighing each bullet and measuring them; possibly trimming the meplat as well.
You will be weighing your PRIMERS, because you want the same ignition temperature, duration and percussion impulse for each shot.
You will deburr the inside of the flash holes in each case, and you will uniform each primer pocket. You will be hand-priming each case, and then measuring the seating depth for uniformity.
It goes without saying that you will hand weigh each charge. However, some shooters acquire fine mesh screens of the proper size, and actually sift the powder to get rid of the "fines" that can change ignition rates.
You must then load each cartridge with seating dies outfitted with micrometer adjustments, to make the seating depth the same for each cartridge, and to ensure that the chambered round puts the bullet to the same point at or close to the lands, measured to the thousandths of an inch.
The idea is to load cartridges that will come from that muzzle at the same velocity, each and every time. And once again, patience is the key. Be well aware of the cooling times required between shots--it is entirely possible in a rifle to ruin the rifle's accuracy potential in as few as 20 rounds--if you crank them off too fast, get the area in front of the chamber too hot and burn out the leade in the barrel.
Precision shooting is not for the faint of heart. It is not for the impatient--I have spent 5 to 6 hours at the range firing 25 rounds out of my bench gun. (By the way, mine is built on a Sako single shot action, with McMillan stock, 30" Hart barrel, Canjar single-set trigger and a Kahles scope, chambered in .220 Swift.)
But it's worth it, to leave a good target "nonchalantly" laying on the bench, and seeing the looks on other shooter's faces when they see a quarter sized group--or smaller, on a good day--fired at 200 yards.
And, it's not out of reach--consider the group fired by a young man with a rifle built on a Nesika Bay action, Kreiger barrel, Jewell trigger, McMillan stock and a 12-42x56 Nightforce scope, chambered in 6.5x284. I believe it was right at five inches--shot at 1000 yards.