Got lucky

[Alderman]

First try with the Thompson Contender 7mm TCU.
Fireforming some brass.
I was pleasantly surprised to have it so close after mounting the scope.
Not a bragging group for sure but I think I’m off to a good start.
Just hope I can find some data for the ballistic tips.
I made a scope adustment and will try again later at 100 yards when the light conditions are better at my range.

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[JD338]

Nice work!
The 120 gr bullet weight is just right for the TCU case as you can get higher volocities.
The 120 gr BT is a very robust bullet. It uses the 140 gr BT jacket cut down to meet the 120 gr BT profile. This makes the jacket walls thicker which enables it to hold together and penetrate.
The 7mm 120 gr BT is the only bullet in the entire Nosler product offering that shares a jacket with another bullet offering. It's a tough bullet, some fellas use it in their 7mm Mags

JD338

 

[DrMike]

Cartridge          : 7 mm T/CU
Bullet             : .284, 120, Nosler BalTip 28120
Useable Case Capaci: 30.031 grain H2O = 1.950 cm³
Cartridge O.A.L. L6: 2.675 inch = 67.95 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-10x

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0   94    24.57   2442    1588   39237   4946     98.5    1.288
-09.0   95    24.84   2466    1620   40492   4987     98.8    1.271
-08.0   96    25.12   2490    1652   41789   5026     99.0    1.253
-07.0   97    25.39   2514    1684   43127   5064     99.2    1.236
-06.0   98    25.66   2538    1716   44508   5100     99.3    1.220
-05.0   99    25.94   2562    1749   45935   5134     99.5    1.203
-04.0  100    26.21   2586    1781   47408   5165     99.6    1.187  ! Near Maximum !
-03.0  101    26.48   2609    1814   48930   5195     99.7    1.172  ! Near Maximum !
-02.0  102    26.75   2633    1847   50502   5223     99.8    1.156  ! Near Maximum !
-01.0  103    27.03   2656    1880   52127   5249     99.9    1.141  ! Near Maximum !
+00.0  105    27.30   2680    1914   53805   5273    100.0    1.126  ! Near Maximum !
+01.0  106    27.57   2703    1947   55540   5295    100.0    1.112  !DANGEROUS LOAD-DO NOT USE!
+02.0  107    27.85   2726    1980   57334   5315    100.0    1.097  !DANGEROUS LOAD-DO NOT USE!
+03.0  108    28.12   2749    2014   59189   5333    100.0    1.083  !DANGEROUS LOAD-DO NOT USE!
+04.0  109    28.39   2772    2048   61108   5351    100.0    1.069  !DANGEROUS LOAD-DO NOT USE!
+05.0  110    28.67   2795    2082   63093   5368    100.0    1.056  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba    105    27.30   2773    2048   64678   5021    100.0    1.053  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    105    27.30   2540    1719   43339   5375     97.0    1.225


Cartridge          : 7 mm T/CU
Bullet             : .284, 120, Nosler BalTip 28120
Useable Case Capaci: 30.031 grain H2O = 1.950 cm³
Cartridge O.A.L. L6: 2.675 inch = 67.95 mm
Barrel Length      : 24.0 inch = 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 54200 psi, or 373 MPa
or a maximum loading ratio or filling of 112 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
Accurate 2520                      110.9     32.4     2.10    2733    97.1    54200    5851   1.106  ! Near Maximum !
Accurate 2495                      112.0     30.3     1.97    2707    99.4    49852    5799   1.158  ! Near Maximum !
Lovex D073.6                       112.0     31.9     2.07    2693    96.6    51336    5796   1.131  ! Near Maximum !
Rottweil R901                      110.8     29.1     1.89    2675    97.7    54200    5578   1.140  ! Near Maximum !
Accurate 2460                      104.9     31.3     2.03    2675    96.1    54200    5590   1.128  ! Near Maximum !

Cartridge          : 7 mm T/CU
Bullet             : .284, 140, Nosler BalTip 28140
Useable Case Capaci: 27.997 grain H2O = 1.818 cm³
Cartridge O.A.L. L6: 2.675 inch = 67.95 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Accurate 2460

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0   93    25.74   2195    1498   37749   4742     93.4    1.425
-09.0   94    26.03   2220    1533   39099   4794     93.9    1.403
-08.0   95    26.31   2245    1567   40503   4846     94.3    1.382
-07.0   96    26.60   2270    1602   41964   4896     94.8    1.361
-06.0   97    26.88   2295    1638   43484   4944     95.2    1.340
-05.0   98    27.17   2320    1674   45067   4990     95.6    1.319
-04.0   99    27.46   2345    1710   46716   5035     96.0    1.299
-03.0  100    27.74   2370    1747   48434   5078     96.4    1.280  ! Near Maximum !
-02.0  101    28.03   2395    1784   50224   5119     96.7    1.260  ! Near Maximum !
-01.0  102    28.31   2420    1821   52091   5158     97.1    1.242  ! Near Maximum !
+00.0  103    28.60   2445    1859   54039   5195     97.4    1.223  ! Near Maximum !
+01.0  104    28.89   2470    1897   56072   5230     97.7    1.204  !DANGEROUS LOAD-DO NOT USE!
+02.0  105    29.17   2495    1936   58196   5263     98.0    1.186  !DANGEROUS LOAD-DO NOT USE!
+03.0  106    29.46   2521    1975   60415   5294     98.3    1.169  !DANGEROUS LOAD-DO NOT USE!
+04.0  107    29.74   2546    2014   62735   5322     98.5    1.151  !DANGEROUS LOAD-DO NOT USE!
+05.0  108    30.03   2571    2054   65162   5349     98.7    1.134  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba    103    28.60   2564    2044   66286   5059     99.9    1.132  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    103    28.60   2284    1622   42553   5061     90.8    1.345



Cartridge          : 7 mm T/CU
Bullet             : .284, 140, Nosler BalTip 28140
Useable Case Capaci: 27.997 grain H2O = 1.818 cm³
Cartridge O.A.L. L6: 2.675 inch = 67.95 mm
Barrel Length      : 24.0 inch = 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 54200 psi, or 373 MPa
or a maximum loading ratio or filling of 112 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
Accurate 2495                      112.0     28.3     1.83    2523   100.0    54200    5335   1.212  ! Near Maximum !
Accurate 2520                      108.9     29.6     1.92    2501    98.2    54200    5430   1.198  ! Near Maximum !
Lovex D073.6                       111.5     29.6     1.92    2501    98.2    54200    5430   1.198  ! Near Maximum !
Lovex D073.5                       103.4     28.6     1.85    2447    97.4    54200    5198   1.221  ! Near Maximum !
Accurate 2460                      103.1     28.6     1.85    2447    97.4    54200    5198   1.221  ! Near Maximum !
Rottweil R901                      108.7     26.7     1.73    2444    98.6    54200    5153   1.234  ! Near Maximum !
SNPE Vectan SP 7                   107.8     29.8     1.93    2423    91.7    54200    5261   1.218  ! Near Maximum !
Hodgdon H380                       112.0     29.5     1.91    2392    90.7    49295    5375   1.254  ! Near Maximum !
IMR 4007 SSC                       112.0     29.3     1.90    2319    85.7    49372    5019   1.276  ! Near Maximum !

 

[Alderman]

Thank you Dr. Mike
I appreciate you taking the time to post the data.


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