I agree with golocx in talking about longrange shooters. They are in it for bragging rights because what they spend on a completely custom rifle in no way justifies the means of what they get out of it. In the link to follow I found the correct dimensions for the different scoring rings on various longrange targets. I shoot manly service rifle (M1 Garand) and can barely break 375 on a good day with it at 200 yards. It's not as easy as it looks.
NRA Highpower/Service Rifle Target Sizes - M14 Forum
.2 100yd Targets
(a) NRA No. SR-I Reduction of the SR Target for use at 100 yards to
simulate the 200-yard stages of the National Match Course.
Aiming Black_(inches)_____Rings in White_(inches)
X ring--------1.35_______________8 ring------9.35
10 ring-------3.35_______________7 ring-----12.35
9 ring--------6.35_______________6 ring-----15.35
___________________________5 ring------18.35
(b) NRA No. SR-21 Reduction of the SR-3 target to simulate the
300-yard stage of the National Match Course at 100 yards.
Aiming Black-(inches)----Rings in White--(inches)
X ring---------0.79 __________ 7 ring---------8.12
10 ring--------2.12 _________ 6 ring---------10.12
9 ring---------4.12 __________ 5 ring---------12.12
8 ring---------6.12
(c) NRA No. MR-31 Reduction of the MR-I target to simulate the
600-yard stage of the National Match Course at 100 yards.
Aiming Black--(inches)--Rings in White--(inches)
X ring----------.75 ___________6 ring---------7.75
10 ring--------1.75__________ 5 ring---------9.75
9 ring---------2.75
8 ring---------3.75
7 ring---------5.75
4.3 200 Yard Targets
(a) No. SR Military "Target, Rifle, Competition, Short Range."
Aiming Black-(inches)--Rings in White-(inches)
X ring--------3.00__________ 8 ring--------19.00
10 ring-------7.00 __________ 7 ring--------25.00
9 ring-------13.00 __________ 6 ring--------31.00
_______________________ 5 ring--------37.00
(b) NRA No. SR-42-Reduction of the SR-3 target to simulate the 300-
yard stage of the National Match Course at 200 yards.
Aiming Black-(inches)--Rings in White-(inches)
X ring---------1.90 _________ 7 ring--------16.56
10 ring--------4.56 _________ 6 ring--------20.56
9 ring---------8.56 _________ 5 ring--------24.56
8 ring---------12.56
(c) NRA No. MR-52-Reduction of the MR-1 target to simulate the
600-yard stage of the National Match Course at 200 yards.
Aiming Black-(inches)--Rings in White-(inches)
X ring---------1.79 ________ 6 ring---------15.79
10 ring--------3.79 ________ 5 ring---------19.79
9 ring---------5.79
8 ring---------7.79
7 ring--------11.79
(d) NRA No. SR-5-Same scoring ring dimensions as No. SR Military
with scoring rings through 7 only; paper size 28 x 28 inches. For use
at 200 yards on ranges with small target frames.
4.4 300 Yard Targets
(a) NRA No. 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.
Aiming Black-(inches)--Rings in White-(inches)
X ring--------3.00 _________ 7 ring--------25.00
10 ring-------7.00 _________ 6 ring--------31.00
9 ring-------13.00 _________ 5 ring--------37.00
8 ring-------19.00
(b) NRA No.MR-63 Reduction of the MR-1 target for use at 300 yards
to simulate the 600-yard stage of the National Match Course.
Aiming Black-(inches)--Rings in White-(inches)
X ring---------2.85 ________ 6 ring---------23.85
10 ring--------5.85 ________ 5 ring---------29.85
9 ring---------8.85
8 ring--------11.85
7 ring--------17.85
4.5 500 Yard Target
(a) No. MR-"Target, Rifle, Competition Mid-Range." Used in 500-yard
matches only.
Aiming Black-(inches)--Rings in White-(inches)
X ring--------6.00 _________ 7 ring----------36.00
10 ring------12.00 _________ 6 ring----------48.00
9 ring-------18.00 _________ 5 ring----------60.00
8 ring-------24.00
4.6 600 Yard Target
(a) MR-I1 target-Enlarged aiming black for use in 600-yard matches
only.
Aiming Black-(inches)--Rings in White-(inches)
X ring---------6.00 __________ 6 ring--------48.00
10 ring-------12.00 _________ 5 ring--------60.00
9 ring--------18.00
8 ring--------24.00
7 ring--------36.00
4.7 800, 900, and 1000 Yard Target
(a) NRA No. LR--
Aiming Black-(inches)--Rings in White-(inches)
X ring--------10.00 _________ 7 ring---------60.00
10 ring-------20.00 _________ 6 area--------72x72 square
9 ring--------30.00
8 ring--------44.00