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Combined data from ammunition tested thru Rohrbaugh R9s.
Sept 16 2004
Hi, Lo and Average velocities are in fps. Muzzle energy (ME)
is in ft lbs and is based on average velocity.
Note - in at least two cases one low velocity has severely
increased the spread figure and so severely reduced the average
... which in turn leads to a downrated muzzle energy. If you
choose to disregard those exceptional low velocities, then
a more useful result may be deduced.
Note 2 - Now that more data has been added, I have
added symbols against examples relative to the session in
which they were fired. The first test is shown as ''†'',
the second test as ''‡'' and the latest, test
#3 as ''*''. The chrono during test #1 was significantly closer
than my now chosen std of 6 feet, and so figures come out
a little higher. |
|
MFR
|
TYPE
|
# SHOTS
|
LO-VEL
|
HI-VEL
|
AV-VEL
|
SPREAD
|
SD
|
ME
|
|
Speer‡
|
Gold Dot 115 JHP
|
4
|
1056
|
1068
|
1061
|
12
|
5.19
|
287
|
|
Speer‡
|
Gold Dot 115 JHP
|
5
|
1053
|
1078
|
1064
|
25
|
10.77
|
289
|
|
Speer‡
|
Gold Dot 115 JHP
|
5
|
1066
|
1077
|
1065
|
11
|
4.97
|
290
|
|
Speer‡
|
Gold Dot 124 JHP
|
5
|
990
|
1039
|
1010
|
49
|
17.94
|
281
|
|
Speer‡
|
Gold Dot 124 JHP
|
5
|
1003
|
1045
|
1017
|
42
|
16.18
|
285
|
|
Speer‡
|
Gold Dot 124 JHP
|
5
|
1003
|
1021
|
1013
|
18
|
6.78
|
283
|
|
Speer *
|
Gold Dot 124 JHP
|
10
|
975
|
1042
|
1020
|
67
|
19.05
|
286
|
|
MFR
|
TYPE
|
# SHOTS
|
LO-VEL
|
HI-VEL
|
AV-VEL
|
SPREAD
|
SD
|
ME
|
|
Federal†
|
American Eagle 124 FMJ
|
5
|
762
|
926
|
885
|
164
|
N/A
|
216
|
|
Federal†
|
'Hydra-Shok' 135 JHP
|
5
|
892
|
920
|
906
|
28
|
N/A
|
246
|
|
Federal†
|
'Hydra-Shok' 147 JHP
|
5
|
799
|
825
|
821
|
26
|
N/A
|
220
|
|
Federal‡
|
'Hi-Shock' 115 JHP
|
5
|
995
|
1034
|
1014
|
39
|
16.70
|
262
|
|
Federal‡
|
'Hi-Shock' 115 JHP
|
5
|
977
|
1039
|
1003
|
62
|
23.60
|
257
|
|
Federal‡
|
'Hi-Shock' 115 JHP
|
5
|
984
|
998
|
991
|
14
|
6.08
|
251
|
|
Federal‡
|
'Hydra-Shok' 147 JHP
|
5
|
806
|
840
|
823.5
|
34
|
12.92
|
221
|
|
Federal‡
|
'Hydra-Shok' 147 JHP
|
5
|
816
|
855
|
828
|
39
|
15.93
|
224
|
|
Federal‡
|
'Hydra-Shok' 135 JHP
|
5
|
910
|
925
|
917
|
15
|
6.24
|
252
|
|
MFR
|
TYPE
|
# SHOTS
|
LO-VEL
|
HI-VEL
|
AV-VEL
|
SPREAD
|
SD
|
ME
|
|
Remington†
|
Golden Saber 124 JHP
|
5
|
981
|
1003
|
993
|
22
|
N/A
|
271
|
|
Remington‡
|
Golden Saber 124 JHP
|
5
|
934
|
1004
|
979
|
70
|
26.66
|
264
|
|
Remington‡
|
UMC 115 FMJ
|
5
|
601
|
1029
|
925
|
427
|
181.88
|
218
|
|
MFR
|
TYPE
|
# SHOTS
|
LO-VEL
|
HI-VEL
|
AV-VEL
|
SPREAD
|
SD
|
ME
|
|
CCI*
|
Blazer 115 JHP (Al case)
|
10
|
963
|
1011
|
983
|
48
|
16.00
|
247
|
|
MFR
|
TYPE
|
# SHOTS
|
LO-VEL
|
HI-VEL
|
AV-VEL
|
SPREAD
|
SD
|
ME
|
|
Winchester†
|
White Box 115 FMJ
|
5
|
1025
|
1038
|
1037
|
13
|
N/A
|
275
|
|
Winchester*
|
White Box 115 FMJ
|
10
|
985
|
1033
|
1008
|
47.42
|
14.35
|
260
|
|
Winchester*
|
White Box 115 JHP
|
10
|
960
|
1014
|
987
|
54
|
16.79
|
250
|
|
Winchester*
|
White Box 147 JHP
|
10
|
955
|
1007
|
976
|
52
|
17.40
|
311
|
|
Winchester*
|
Silvertip 115
|
10
|
1023
|
1046
|
1037
|
23
|
7.28
|
275
|
|
Winchester*
|
Ranger 147
|
10
|
811
|
868
|
850
|
57
|
15.09
|
236
|
|
MFR
|
TYPE
|
# SHOTS
|
LO-VEL
|
HI-VEL
|
AV-VEL
|
SPREAD
|
SD
|
ME
|
|
Igman†
|
124 FMJ
|
5
|
960
|
1035
|
997
|
75
|
N/A
|
274
|
|
MFR
|
TYPE
|
# SHOTS
|
LO-VEL
|
HI-VEL
|
AV-VEL
|
SPREAD
|
SD
|
ME
|
|
''A-Merc''†
|
115 FMJ
|
5
|
353
|
373
|
365
|
20
|
N/A
|
34
|
|
| NOTE - The last ammunition on this list (A-Merc)
shows very unusual results. It was the last in a test series
but the chronograph was set-up exactly as for preceeding tests,
although the light level had dropped. It cycled the gun, tho
hard to believe! The odd thing is that the five shot string
shows quite a small spread, making the readings seem viable,
despite absurd low velocity. In time it is hoped to run a
further test on this ammo' to see if it is truly as low as
it seems from this test! Either way, it seems very poor quality
indeed, with deformed (plated) bullets common. |
| It is still hoped to be able to add extra data over time,
and if anyone has some five or ten shot strings with figures,
on ammo thus far not covered, please let us have them to add, by email at
. |
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