6
TBR PERFORMANCE GROUPS: CARTRIDGE TABLE
TBR
Group
Sight-In
Distance
Cartridge Name
Bullet Weight
(grains) (grams)
Muzzle Velocity
(feet per second) (meters per second)
A
300 Yards /
274 Meters
.270 Weatherby Magnum
100 6.5 3760 1146
Lazzeroni 7.21 Firebird
140 9.1 3640 1109
.30-.378 Weatherby
165 10.7 3500 1067
.30-.378 Weatherby
180 11.7 3450 1052
.300 Weatherby Magnum
150 9.7 3450 1059
B
300 Yards /
274 Meters
.240 Weatherby
87 5.6 3520 1073
.240 Weatherby
100 6.5 3400 1036
.270 Weatherby Magnum
130 8.4 3200 975
.270 Weatherby Magnum
150 9.7 3245 989
.270 Winchester Short Magnum
130 8.4 3250 991
7mm Shooting Times Westerner
140 9.1 3330 1015
7mm Shooting Times Westerner
160 10.4 3050 930
7mm Weatherby Magnum
139 9.0 3340 1018
7mm Weatherby Magnum
175 11.3 3070 936
7mm Winchester Short Magnum
140 9.1 3310 1009
.300 Remington Ultra Magnum
180 11.7 3250 991
.300 Remington Ultra Magnum
200 13.0 3025 922
.300 Weatherby Magnum
180 11.7 3250 991
.300 Winchester Magnum
150 9.7 3280 1000
.300 Winchester Magnum
180 11.7 2960 902
.300 Winchester Short Magnum
150 9.7 3300 1006
.300 Winchester Short Magnum
180 11.7 3025 922
.338 Remington Ultra Magnum
180 11.7 3030 924
C
200 Yards /
183 Meters
.204 Ruger
32 2.1 4225 1288
.204 Ruger
40 2.6 3090 942
.22-250 Remington
55 3.6 3650 1113
.223 Remington
40 2.6 3700 1128
.223 Winchester Super Short Magnum
55 3.6 3850 1173
.223 Winchester Super Short Magnum
64 4.1 3600 1097
.243 Winchester Super Short Magnum
55 3.6 4060 1237
.243 Winchester Super Short Magnum
100 6.5 3110 948
.25 Winchester Super Short Magnum
85 5.5 3470 1058
.25-06 Remington
115 7.5 2990 911
.25-06 Remington
120 7.8 2990 911
.260 Remington
120 7.8 2890 881
.270 Winchester
130 8.4 2910 887
.270 Winchester
150 9.7 2850 869
.270 Winchester Short Magnum
150 9.7 3275 998
7mm Winchester Short Magnum
160 10.4 2990 911
.280 Remington
140 9.1 2990 911
.280 Remington
150 9.7 2890 881
AB
200 Yards /
183 Meters
.243 Winchester
100 6.5 2950 899
.243 Winchester
100 6.5 2960 902
7mm-08
120 7.8 3000 914
7mm-08
140 9.1 2800 853
.338 Remington Ultra Magnum
250 16.2 2660 811
.338 Winchester Magnum
210 13.6 2829 862
AC
200 Yards /
183 Meters
.25 Winchester Super Short Magnum
120 7.8 2990 911
.260 Remington
115 7.5 2750 838
6.5x55mm Swedish
140 9.1 2630 802
7mm Remington Magnum
175 11.3 3150 960
.280 Remington
160 10.4 2940 896
.300 H&H Magnum
180 11.7 2880 878
.300 Weatherby Magnum
200 13.0 2700 823
.30-06 Springfield
125 8.1 3140 957
.30-06 Springfield 180 11.7 2700 823
.308 Winchester 150 9.7 2820 860
.308 Winchester 168 10.9 2670 814
.338 Winchester Magnum 210 13.6 2830 863
.338 Winchester Magnum 250 16.2 2650 808
.378 Weatherby Magnum 300 19.4 2800 853
.460 Weatherby Magnum 450 29.2 2700 823
BC
200 Yards /
183 Meters
.378 Weatherby Magnum 300 19.4 2925 892
ABC
200 Yards /
183 Meters
.223 Remington 64 4.1 3020 920
.378 Weatherby Magnum 300 19.4 2920 890
For hand loads or any other unique loads not shown in the above list, the
table in the next column provides a guideline for selecting the appropriate
TBR performance group. Check the ballistic performance of your bullet by
consulting your reloading manual, ballistics software, or by referring to
literature or Web sites provided by your cartridge manufacturer. You
may also visit the Leupold Web site at www.leupold.com for more
assistance in selecting your group. If you have your ballistics performance
data, select your performance group from the table on the next page
based on the bullet path at 500 yards (457 meters). Be sure not to
confuse bullet path with bullet drop. Bullet path will be related back to
your sight-in range whereas bullet drop relates only to the total drop of
the bullet, regardless of sight-in range.
Long Range Group Selection —
If you intend to shoot varmints
or targets at ranges beyond 500 yards (457 meters), selecting your
group based on 800 yard (732 meter) performance will provide a
better performance match throughout this working range. Select
your group for extreme long range shooting from the table below.
TBR PERFORMANCE GROUP SELECTION TABLE: FOR BEST FIT UP TO 500 YARDS (457 METERS)
TBR Group 500 Yards (457 Meters) Bullet Path Sight-in Range
A
Less than -20 inches (-51 cm) of path height 300 Yards / 274 Meters
B
-20 to -25 inches (-51 to -64 cm) 300 Yards / 274 Meters
C
-35 to -41 inches* (-89 to -104 cm) 200 Yards / 183 Meters
AB
-41 to -42.5 inches (-104 to -108 cm) 200 Yards / 183 Meters
AC
-42.5 to -49.5 inches (-108 to -126 cm) 200 Yards / 183 Meters
BC
-49.5 to -52 inches (-126 to -132 cm) 200 Yards / 183 Meters
ABC
More than -52 inches (-132 cm) of path height
[if the path height is more than 64 inches (163 cm),
performance will be reduced by the difference]
200 Yards / 183 Meters
* If your bullet path height is less than -20 inches (-51 cm) at 500 yards (457 meters) with a
200 yard (183 meter) sight-in, consider sighting-in at 300 yards (274 meters) and selecting
group A or B. Alternately, you can use group C with a 200 yard (183 meter) sight-in, but
the TBR will be less accurate at extreme long ranges.
TBR PERFORMANCE GROUP SELECTION TABLE: FOR BEST FIT UP TO 800 YARDS (732 METERS)
TBR Group 800 Yards (732 Meters) Bullet Path Sight-in Range
A
Less than -96 inches (-244 cm) of path height 300 Yards / 274 Meters
B
-96 to -120 inches (-244 to -305 cm) 300 Yards / 274 Meters
C
-139 to -164 inches** (-353 to -417 cm) 200 Yards / 183 Meters
AB
-164 to -189 inches (-417 to -480 cm) 200 Yards / 183 Meters
AC
-189 to -212 inches (-480 to -538 cm) 200 Yards / 183 Meters
BC
-212 to -236 inches (-538 to -599 cm) 200 Yards / 183 Meters
ABC
More than -236 inches (-599 cm) of path height [if the path height
is more than 250 inches (635 cm), performance will be reduced
by the difference]
200 Yards / 183 Meters
** If your bullet path height is less than -139 inches (-353 cm) at 800 yards (732 meters) with
a 200 yard (183 meter) sight-in, consider sighting-in at 300 yards (274 meters) and selecting
group A or B. Alternately, you can use group C with a 200 yard (183 meter) sight-in, but
the TBR will be less accurate at extreme long ranges.
REMEMBER: Knowing your theoretical bullet path at long ranges
does not provide a license to take shots beyond ranges at which
you have practiced, particularly at game animals or where stray
shots could hit unintended targets. It is your responsibility to have
intimate familiarity with the performance of your firearm and take
full responsibility for the projectile. The RX digital laser rangefinder
may serve best as a tool for learning performance during practice at
a secure range so you are ready for that critical shot.
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