7mm TCU load data

[mtnman31]

I have a 7mm TCU Encore (15" barrel) that I am loading for. I have 139gr BT, 150gr BTSP, and 160gr BTSP bullets in my cabinet. I would like to use the powders I already have on hand (IMR 4198, IMR 3031, H4350, and IMR 4895). Anyone have any recommended loads for any of these combos?

I've looked on the WWW and found a number of loads for 7mm TCU but most are either using the lighter bullets or powders I don't currently have. I'm not looking for the fastest velocity, just a good, solid load for target shooting. If you aren't comfortable publishing your load data on the board, feel free to PM me.

Thanks in advance.

 

[243winxb]

Fine data here. http://stevespages.com/page8a.htm Had one, but not long. To many split necks.

 

[Iowa Fox]

I have a 14" Contender and use H335 for the 140's and H4895 for the 150's & 160's. 2460 is another good powder for those weight of bullets but H335 & H4895 are so common and work well for me for other cartridge loading that I always have those 2 on hand.

 

[Zero333]

Hodgdon lists the following powders for the 7 TCU under the "pistol" stuff...

BLC-2
H-335
H-4895
H-322
H-4198
H-4227

 

[Zero333]

You can use this Quickload data as a reference to any other data you may find.

First column = Step in charge %
Second = Case fill %
Third = Charge Weight in Grains (gr)
Fourth = Velocity FPS
Fifth = Muzzle ENERGY Ft-lbs
Sixth = Chamber Pressure in PSI
Seventh = Muzzle Pressure PSI
Eighth = Powder burn %
Ninth = barrel time in milliseconds (ms)
------------------------------------------------------------
Cartridge : 7 mm T/CU
Bullet : .284, 140, Nosler BalTip 28140
Useable Case Capaci: 27.280 grain H2O = 1.771 cm³
Cartridge O.A.L. L6: 2.630 inch = 66.80 mm
Barrel Length : 14.0 inch = 355.6 mm
Powder : IMR 4198

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 78 17.60 1704 902 27768 6545 92.5 1.140
-18.0 80 18.04 1742 943 29366 6742 93.4 1.114
-16.0 82 18.48 1780 984 31047 6935 94.3 1.089
-14.0 84 18.92 1817 1027 32816 7122 95.1 1.065
-12.0 86 19.36 1855 1070 34679 7303 95.9 1.042
-10.0 88 19.80 1893 1114 36640 7478 96.6 1.018
-08.0 90 20.24 1930 1158 38704 7646 97.2 0.993
-06.0 92 20.68 1967 1203 40877 7806 97.8 0.968
-04.0 94 21.12 2005 1249 43168 7959 98.3 0.944
-02.0 96 21.56 2042 1296 45582 8103 98.7 0.920
+00.0 98 22.00 2079 1343 48126 8239 99.1 0.897 ! Near Maximum !
+02.0 100 22.44 2115 1391 50811 8365 99.4 0.876 ! Near Maximum !
+04.0 101 22.88 2152 1439 53643 8483 99.6 0.855 ! Near Maximum !
+06.0 103 23.32 2188 1488 56633 8590 99.8 0.834 !DANGEROUS LOAD-DO NOT USE!
---------------------------------------------------------------------

Cartridge : 7 mm T/CU
Bullet : .284, 140, Nosler BalTip 28140
Useable Case Capaci: 27.280 grain H2O = 1.771 cm³
Cartridge O.A.L. L6: 2.630 inch = 66.80 mm
Barrel Length : 14.0 inch = 355.6 mm
Powder : IMR 3031

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 90 21.04 1701 900 25128 7364 83.7 1.180
-18.0 92 21.57 1747 949 26770 7648 85.2 1.149
-16.0 94 22.09 1793 999 28526 7927 86.7 1.118
-14.0 96 22.62 1839 1051 30404 8201 88.1 1.089
-12.0 98 23.14 1886 1106 32417 8468 89.5 1.060
-10.0 101 23.67 1933 1161 34575 8727 90.8 1.031
-08.0 103 24.20 1980 1219 36890 8977 92.0 1.004
-06.0 105 24.72 2028 1278 39377 9218 93.1 0.974
-04.0 107 25.25 2076 1339 42052 9446 94.2 0.943
-02.0 110 25.77 2124 1402 44930 9662 95.2 0.914
+00.0 112 26.30 2172 1466 48035 9865 96.1 0.886 ! Near Maximum !
+02.0 114 26.83 2220 1533 51385 10052 96.9 0.859 ! Near Maximum !
+04.0 116 27.35 2269 1600 55009 10224 97.6 0.833 !DANGEROUS LOAD-DO NOT USE!
------------------------------------------------------

Cartridge : 7 mm T/CU
Bullet : .284, 140, Nosler BalTip 28140
Useable Case Capaci: 27.280 grain H2O = 1.771 cm³
Cartridge O.A.L. L6: 2.630 inch = 66.80 mm
Barrel Length : 14.0 inch = 355.6 mm
Powder : IMR 4895

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 88 22.24 1664 861 24862 7031 74.0 1.194
-18.0 91 22.80 1710 909 26523 7323 75.5 1.162
-16.0 93 23.35 1756 958 28304 7615 77.0 1.131
-14.0 95 23.91 1802 1010 30216 7906 78.5 1.101
-12.0 97 24.46 1849 1063 32271 8197 80.0 1.071
-10.0 100 25.02 1897 1119 34483 8485 81.4 1.042
-08.0 102 25.58 1945 1176 36865 8770 82.8 1.013
-06.0 104 26.13 1994 1236 39434 9051 84.2 0.981
-04.0 106 26.69 2043 1298 42208 9327 85.5 0.950
-02.0 108 27.24 2093 1362 45207 9598 86.8 0.920
+00.0 111 27.80 2143 1428 48457 9861 88.1 0.891 ! Near Maximum !
+02.0 113 28.36 2194 1497 51983 10117 89.3 0.863 ! Near Maximum !
+04.0 115 28.91 2245 1567 55816 10364 90.4 0.835 !DANGEROUS LOAD-DO NOT USE!
-------------------------------------------------------

H-4350 is too slow for 139/140 grain bullets, and IMR-3031 & IMR-4895 are compressed loads at Max charge weights.

 

[Zero333]

Cartridge : 7 mm T/CU
Bullet : .284, 150, Sierra SPBT 1913
Useable Case Capaci: 28.072 grain H2O = 1.823 cm³
Cartridge O.A.L. L6: 2.600 inch = 66.04 mm
Barrel Length : 15.0 inch = 381.0 mm
Powder : IMR 4198

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 76 17.60 1693 954 28080 6192 94.8 1.222
-18.0 78 18.04 1729 996 29675 6365 95.6 1.195
-16.0 80 18.48 1766 1038 31350 6532 96.4 1.169
-14.0 82 18.92 1802 1081 33111 6693 97.0 1.143
-12.0 83 19.36 1838 1125 34960 6848 97.6 1.119
-10.0 85 19.80 1874 1170 36904 6996 98.2 1.094
-08.0 87 20.24 1910 1214 38947 7137 98.6 1.067
-06.0 89 20.68 1945 1260 41095 7270 99.0 1.041
-04.0 91 21.12 1980 1306 43349 7396 99.3 1.015
-02.0 93 21.56 2015 1353 45728 7513 99.6 0.991
+00.0 95 22.00 2050 1400 48227 7622 99.8 0.967 ! Near Maximum !
+02.0 97 22.44 2085 1447 50856 7721 99.9 0.944 ! Near Maximum !
+04.0 99 22.88 2119 1495 53626 7812 100.0 0.923 ! Near Maximum !
+06.0 100 23.32 2153 1543 56542 7894 100.0 0.901 !DANGEROUS LOAD-DO NOT USE!
-------------------------------------------------------

Cartridge : 7 mm T/CU
Bullet : .284, 150, Sierra SPBT 1913
Useable Case Capaci: 27.266 grain H2O = 1.770 cm³
Cartridge O.A.L. L6: 2.550 inch = 64.77 mm
Barrel Length : 15.0 inch = 381.0 mm
Powder : IMR 3031

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 88 20.64 1692 953 25424 6913 86.9 1.265
-18.0 90 21.16 1736 1004 27068 7160 88.3 1.232
-16.0 92 21.67 1780 1055 28824 7402 89.7 1.200
-14.0 94 22.19 1825 1109 30701 7637 90.9 1.168
-12.0 97 22.70 1869 1164 32708 7864 92.1 1.138
-10.0 99 23.22 1914 1221 34856 8083 93.3 1.108
-08.0 101 23.74 1959 1279 37157 8292 94.3 1.078
-06.0 103 24.25 2005 1338 39623 8491 95.3 1.046
-04.0 105 24.77 2050 1400 42270 8678 96.2 1.015
-02.0 108 25.28 2095 1462 45112 8853 97.0 0.984
+00.0 110 25.80 2141 1526 48171 9015 97.7 0.955 ! Near Maximum !
+02.0 112 26.32 2186 1592 51463 9162 98.3 0.927 ! Near Maximum !
+04.0 114 26.83 2231 1658 55013 9294 98.8 0.899 !DANGEROUS LOAD-DO NOT USE!
----------------------------------------------------------------

Cartridge : 7 mm T/CU
Bullet : .284, 150, Sierra SPBT 1913
Useable Case Capaci: 27.266 grain H2O = 1.770 cm³
Cartridge O.A.L. L6: 2.550 inch = 64.77 mm
Barrel Length : 15.0 inch = 381.0 mm
Powder : IMR 4895

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 87 21.76 1650 907 24975 6616 77.0 1.285
-18.0 89 22.30 1694 956 26620 6879 78.5 1.251
-16.0 91 22.85 1738 1007 28381 7141 80.0 1.218
-14.0 93 23.39 1783 1059 30269 7401 81.4 1.185
-12.0 95 23.94 1829 1114 32291 7659 82.8 1.154
-10.0 97 24.48 1874 1170 34466 7914 84.1 1.123
-08.0 100 25.02 1920 1228 36803 8166 85.4 1.093
-06.0 102 25.57 1967 1289 39314 8413 86.7 1.060
-04.0 104 26.11 2014 1351 42021 8654 87.9 1.027
-02.0 106 26.66 2061 1415 44939 8890 89.1 0.996
+00.0 108 27.20 2109 1481 48090 9118 90.2 0.965 ! Near Maximum !
+02.0 110 27.74 2157 1549 51498 9338 91.3 0.935 ! Near Maximum !
+04.0 113 28.29 2205 1619 55191 9550 92.4 0.907 !DANGEROUS LOAD-DO NOT USE!
-------------------------------------------------------------

Cartridge : 7 mm T/CU
Bullet : .284, 150, Sierra SPBT 1913
Useable Case Capaci: 27.266 grain H2O = 1.770 cm³
Cartridge O.A.L. L6: 2.550 inch = 64.77 mm
Barrel Length : 15.0 inch = 381.0 mm
Powder : Hodgdon H4350

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 96 23.60 1562 813 24303 5682 66.0 1.306
-18.0 98 24.19 1604 857 25951 5929 67.5 1.271
-16.0 101 24.78 1647 904 27726 6178 69.0 1.237
-14.0 103 25.37 1691 952 29639 6429 70.4 1.203
-12.0 106 25.96 1735 1003 31704 6681 71.9 1.169
-10.0 108 26.55 1781 1056 33935 6934 73.3 1.136
-08.0 110 27.14 1827 1111 36350 7186 74.8 1.104
-06.0 113 27.73 1874 1169 38969 7437 76.2 1.070
-04.0 115 28.32 1921 1229 41816 7686 77.6 1.035
-02.0 118 28.91 1970 1292 44918 7933 79.1 1.002
+00.0 120 29.50 2019 1357 48302 8177 80.4 0.969 ! Near Maximum !
+02.0 122 30.09 2069 1426 52008 8416 81.8 0.937 ! Near Maximum !
+04.0 125 30.68 2120 1497 56074 8650 83.2 0.906 !DANGEROUS LOAD-DO NOT USE!

Note: H-4350 is too slow burning to safely reach Max pressures with out extremely compressing the powders.
26 gr of H-4350 is the highest powder charge weight before you start to heavily compress the powder.

 

[Zero333]

Cartridge : 7 mm T/CU
Bullet : .284, 160, Sierra SPBT 1920
Useable Case Capaci: 27.029 grain H2O = 1.755 cm³
Cartridge O.A.L. L6: 2.600 inch = 66.04 mm
Barrel Length : 15.0 inch = 381.0 mm
Powder : IMR 4198

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 76 16.88 1632 946 28306 5960 95.7 1.261
-18.0 77 17.30 1667 987 29910 6121 96.4 1.233
-16.0 79 17.72 1701 1028 31594 6276 97.1 1.206
-14.0 81 18.15 1736 1071 33363 6426 97.6 1.180
-12.0 83 18.57 1770 1113 35221 6568 98.2 1.153
-10.0 85 18.99 1804 1157 37173 6705 98.6 1.128
-08.0 87 19.41 1838 1200 39224 6834 99.0 1.101
-06.0 89 19.83 1872 1245 41379 6955 99.4 1.074
-04.0 91 20.26 1905 1290 43643 7069 99.6 1.048
-02.0 93 20.68 1938 1335 46026 7174 99.8 1.023
+00.0 94 21.10 1971 1381 48529 7271 99.9 0.999 ! Near Maximum !
+02.0 96 21.52 2004 1427 51163 7360 100.0 0.976 ! Near Maximum !
+04.0 98 21.94 2036 1473 53930 7441 100.0 0.953 ! Near Maximum !
+06.0 100 22.37 2068 1520 56856 7519 100.0 0.931 !DANGEROUS LOAD-DO NOT USE!
--------------------------------------------------------------

Cartridge : 7 mm T/CU
Bullet : .284, 160, Sierra SPBT 1920
Useable Case Capaci: 27.029 grain H2O = 1.755 cm³
Cartridge O.A.L. L6: 2.600 inch = 66.04 mm
Barrel Length : 15.0 inch = 381.0 mm
Powder : IMR 3031

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 87 20.16 1647 964 25693 6893 88.7 1.300
-18.0 89 20.66 1689 1014 27342 7130 90.0 1.266
-16.0 91 21.17 1731 1065 29103 7361 91.3 1.233
-14.0 93 21.67 1774 1118 30981 7584 92.4 1.201
-12.0 95 22.18 1817 1172 32988 7799 93.5 1.170
-10.0 97 22.68 1859 1228 35131 8005 94.6 1.139
-08.0 100 23.18 1902 1285 37425 8201 95.5 1.109
-06.0 102 23.69 1945 1344 39881 8386 96.3 1.076
-04.0 104 24.19 1988 1404 42511 8560 97.1 1.044
-02.0 106 24.70 2031 1465 45332 8721 97.8 1.014
+00.0 108 25.20 2074 1528 48362 8869 98.4 0.984 ! Near Maximum !
+02.0 110 25.70 2116 1591 51618 9002 98.9 0.956 ! Near Maximum !
+04.0 113 26.21 2159 1656 55122 9121 99.3 0.928 !DANGEROUS LOAD-DO NOT USE!
------------------------------------------------------

Cartridge : 7 mm T/CU
Bullet : .284, 160, Sierra SPBT 1920
Useable Case Capaci: 27.029 grain H2O = 1.755 cm³
Cartridge O.A.L. L6: 2.600 inch = 66.04 mm
Barrel Length : 15.0 inch = 381.0 mm
Powder : IMR 4895

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 85 21.28 1608 919 25311 6642 78.9 1.318
-18.0 88 21.81 1651 968 26967 6899 80.3 1.284
-16.0 90 22.34 1693 1019 28739 7155 81.7 1.250
-14.0 92 22.88 1736 1071 30635 7409 83.1 1.217
-12.0 94 23.41 1780 1126 32667 7660 84.5 1.185
-10.0 96 23.94 1824 1182 34845 7908 85.7 1.154
-08.0 98 24.47 1868 1239 37184 8151 87.0 1.123
-06.0 100 25.00 1912 1299 39693 8390 88.2 1.089
-04.0 102 25.54 1957 1361 42395 8623 89.4 1.056
-02.0 105 26.07 2002 1424 45302 8849 90.5 1.024
+00.0 107 26.60 2047 1489 48433 9068 91.5 0.993 ! Near Maximum !
+02.0 109 27.13 2093 1556 51817 9279 92.6 0.963 ! Near Maximum !
+04.0 111 27.66 2139 1625 55473 9480 93.5 0.934 !DANGEROUS LOAD-DO NOT USE!
------------------------------------------------------

Cartridge : 7 mm T/CU
Bullet : .284, 160, Sierra SPBT 1920
Useable Case Capaci: 27.029 grain H2O = 1.755 cm³
Cartridge O.A.L. L6: 2.600 inch = 66.04 mm
Barrel Length : 15.0 inch = 381.0 mm
Powder : Hodgdon H4350

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 95 23.12 1524 826 24576 5747 67.9 1.340
-18.0 97 23.70 1565 871 26229 5993 69.4 1.304
-16.0 100 24.28 1607 917 28005 6240 70.8 1.269
-14.0 102 24.85 1649 966 29917 6489 72.3 1.234
-12.0 104 25.43 1692 1017 31976 6738 73.7 1.200
-10.0 107 26.01 1736 1070 34199 6987 75.1 1.167
-08.0 109 26.59 1780 1126 36601 7235 76.6 1.134
-06.0 111 27.17 1825 1184 39201 7482 78.0 1.099
-04.0 114 27.74 1871 1244 42020 7727 79.3 1.064
-02.0 116 28.32 1917 1306 45084 7969 80.7 1.030
+00.0 119 28.90 1964 1371 48421 8207 82.1 0.997 ! Near Maximum !
+02.0 121 29.48 2012 1439 52062 8440 83.4 0.965 ! Near Maximum !
+04.0 123 30.06 2061 1509 56046 8668 84.7 0.933 !DANGEROUS LOAD-DO NOT USE!

Once again H-4350 is a bit too slow burning for this application to take advantage of a full burn.
Anything above 107% case fill is a compressed load.

Good luck, be safe and Have fun !

 

[powderbrake]

When I was shooting IHMSA, I used 160 gr Sierras, 28.4 gr of 748. This was under the 2000fps limit in those days without AR500 steel for the targets.

An old Hornady book shows for 7 TCU:

139 gr, IMR 3031, 24.3 gr ( 1600fps), to 27.5 gr (1900)max
IMR 4895. 25.3 (1600) to 29.2 (1950)max

154 gr, IMR 3031, 22.9 (1500) to 26.0 (1800) max
IMR 4895, 24.0 (1500) to 28.3 (1850) max
Win 748, 24.8 (1500) to 29.4 (1800) max

 

[mtnman31]

Thank you, all. That gives me a bunch to work with and start from. I usually keep Win 748 on hand as well, but am currently out.

 

[2ndtimer]

Back in the IHMSA days, I started with Win. 748, but switched to Accurate 2460 with 139, 140 and 150 gr bullets in my 10" Contender barrel. Another option to consider.

 

[gemihur]

Have at it!
Manufact. data

Shooter's Reference Load Data for 7 mm TCU (Thompson / Center Ugalde)

www.shootersreference.com