This is from an old NRA HI power rulebook. Same info is available for under 100 yds for pistol shooting, look in the NRA Pistol rules:
High power rifle shooting at the full regulation distances requires a range
with firing lines at 200, 300 and 600 (or 500) yards.
Every official NRA stage or course of fire normally conducted at 200, 300, or
600 yards can be run at 100 yards on NRA official reduced targets. The SR-1
target simulates the 200 yard target; the SR-21 is the 100 yard equivalent of
the 300 yard target and the MR-31 gives the same appearance at 100 yards as the
normal 600 yard target does at the full distance.
Because of their smaller size, the reduced targets are well adapted to being
hung on stationary frames. Because of the short distances involved, it is
practicable to walk down to the targets after each string and remove them for
scoring elsewhere or to score then on the frames. The use of stationary target
frames avoids the complications that sometimes arise when the number of
shooters on the line isn't equal to the number of target operators in the pits.
Reduced 300 and 600 yard targets are also available for firing at 200 yards.
The NRA can provide a list of target sources, including reduced targets.
FROM
http://mountainwebs.com/lrgc/hp_intro.htm
100 Yard Targets
SR-1 - Reduction of the SR Target for use at 100 yards
slow and rapid fire to simulate the 200 yard stages of the National Match Course.
X ring 1.35
10 ring 3.35
9 ring 6.35
8 ring 9.35
7 ring 12.35
6 ring 15.35
5 ring 18.35
SR-21 - Reduction of the SR-3 Target for use at 100 yards
rapid fire to simulate the 300 yard stage of the National Match Course.
X ring 0.79
10 ring 2.12
9 ring 4.12
8 ring 6.12
7 ring 8.12
6 ring 10.12
5 ring 12.12
MR-31 - Reduction of the MR-1 Target for use at 100 yards
slow fire to simulate the 600 yard stage of the National Match Course.
X ring 0.75
10 ring 1.75
9 ring 2.75
8 ring 3.75
7 ring 5.75
6 ring 7.75
5 ring 9.75
200 Yard Targets
SR Military "Target, Rifle, Competition, Short Range"
X ring 3.00
10 ring 7.00
9 ring 13.00
8 ring 19.00
7 ring 25.00
6 ring 31.00
5 ring 37.00
SR-5 - For use at 200 yards on ranges with small target frames. Same scoring ring dimensions as SR Military with scoring rings through 7 only: paper size 28x28 inches.
SR-42 - Reduction of the SR-3 Target for use at 200 yards
rapid fire to simulate the 300 yard stage of the National Match Course.
X ring 1.90
10 ring 4.56
9 ring 8.56
8 ring 12.56
7 ring 16.56
6 ring 20.56
5 ring 25.56
MR-52 - Reduction of the MR-1 Target for use at 200 yards
slow fire to simulate the 600 yard stage of the National Match Course.
X ring 1.79
10 ring 3.79
9 ring 5.79
8 ring 7.79
7 ring 11.79
6 ring 15.79
5 ring 19.79
300 Yard Targets
SR-3 - Enlarged aiming black for use in 300 yard
rapid fire matches only. Scoring rings the same as the SR target, with the 8-ring in the aiming black.
X ring 3.00
10 ring 7.00
9 ring 13.00
8 ring 19.00
7 ring 25.00
6 ring 31.00
5 ring 37.00
MR-63 - Reduction of the MR-1 Target for use at 300 yards slow fire to simulate the 600 yard stage of the National Match Course.
X ring 2.85
10 ring 5.85
9 ring 8.85
8 ring 11.85
7 ring 17.85
6 ring 23.85
5 ring 29.85
500 Yard Targets
MR - "Target, Rifle, Competition, Midrange" Used in 500 yard slo fire matches only.
X ring 6.00
10 ring 12.00
9 ring 18.00
8 ring 24.00
7 ring 36.00
6 ring 48.00
5 ring 60.00
600 Yard Targets
MR-1 Enlarged aiming black for use in 600 yard slow fire matches only.
X ring 6.00
10 ring 12.00
9 ring 18.00
8 ring 24.00
7 ring 36.00
6 ring 48.00
5 ring 60.00
800, 900,1000 Yard Targets
LR - "Target, Rifle, Competition, Long Range."
X ring 10.00
10 ring 20.00
9 ring 30.00
8 ring 44.00
7 ring 60.00
6 area 72 x 72 square
