High power shooting uses powerful centerfire rifles at distances greater than those of the shorter range rimfire rifles used in smallbore competitions. Scopes become more important and sophisticated due to the longer distances involved. Accessories allowed are correspondingly due to the larger recoil of centerfire guns.
This competition involves four strings of fire, which are the basic building blocks of any National Rifle Association (NRA) High Power Rifle shooting tournament. Any match includes some multiple of these four strings:
Rapid Fire, 10 rounds at 300 yards in 70 seconds.
Slow Fire means the shooter assumes the prescribed (standing) position and is allowed one minute per shot to fire the 10 round string. In Rapid Fire sitting or kneeling, the shooter uses a preparation period to establish that position; then comes to a standing position and, on command, loads either 2 or 5 rounds (depending on the firearm) into the rifle. The sequence is repeated until the 10 rounds are fired.
Long Range Competition
NRA rules provide for slow fire from a prone position at ranges beyond 600 yards. Some of these matches permit the use of telescopic sights.
Reduced Distance Competition
Every official NRA stage or course of fire that is normally conducted at 200, 300, or 500 yards can be run at 100 yards on the NRA official reduced targets. The reduced sized targets are easily hung on stationary frames and it is easy to walk to the targets after each string and remove them for convenient scoring.
High Power Sporting Rifle
This variation uses hunting type rifles, which may be equipped with telescopic sights. The course is fired at either 100 or 200 yards distance. Rapid fire strings are the standard using only 4 rounds that are common to the typical hunting rifle.
Rifles used in high power rifle competition must be equipped with metallic sights and should be capable of holding at least 5 rounds of ammunition. They must also be adapted to rapid reloading. Some 1,000-yard matches allow the use of any sight.
Tournament programs often group competitions into two divisions: Service Rifle and Match Rifle. Service rifles include the M1 Garand, M14 carbine, M16 assault type rifle, and their commercial equivalents. Match rifles include the Winchester and Remington Model 70 and Model 40X rifles made in "match" versions, and match rifles made by custom gunsmiths on many military and commercial actions. The 1903 and 1903-A3 Springfield, 1917 Enfields and pre-war Winchester Model 70 Sporters in .30-06 are all equipped with clip slots for rapid reloading.
The most suitable non-telescopic rear sights are apertures or peeps with reliable, repeatable .5-minute (or finer) adjustments. Front sights should be of either the post or aperture type.