Help needed, 7mm Rem Mag, 180 Berger VLD RETUMBO RESULTS

pharmseller · Dec 10, 2015

My brother's T3 shoots the HSM stuff into little bitty holes. I found some bullets and I'd like to work up some loads for him for Christmas. I have the factory brass from the HSM loads as well as Remington brass. I have Retumbo, MagPro, and RL22 on hand. WLRM primers.

Any have some good recipes?

P

pharmseller · Dec 26, 2015

Quick load, maybe?

Tikka T3 7mm Rem Mag, 24" barrel, 180 VLD, Retumbo.

Thanks.

P

FOTIS · Dec 26, 2015

I get off work at 0700 hours tomorrow.........

DrMike · Dec 26, 2015

Sorry, didn't see this before.

Code:

Cartridge          : 7 mm Rem. Mag.(SAAMI)
Bullet             : .284, 180, Berger Hunt VLD G7 #28502
Useable Case Capaci: 71.029 grain H2O = 4.612 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon Retumbo

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    57.20   2296    2108   29671  11209     94.9    1.717
-18.0   89    58.63   2360    2225   31781  11553     96.2    1.669
-16.0   91    60.06   2423    2347   34054  11871     97.3    1.623
-14.0   93    61.49   2487    2471   36499  12157     98.3    1.578
-12.0   96    62.92   2550    2599   39135  12409     99.0    1.528
-10.0   98    64.35   2613    2729   41978  12625     99.5    1.477
-08.0  100    65.78   2676    2862   45049  12803     99.9    1.427
-06.0  102    67.21   2738    2996   48370  12940    100.0    1.380
-04.0  104    68.64   2800    3133   51963  13050    100.0    1.334  ! Near Maximum !
-02.0  106    70.07   2861    3271   55861  13155    100.0    1.290  ! Near Maximum !
+00.0  109    71.50   2921    3411   60090  13254    100.0    1.248  ! Near Maximum !
+02.0  111    72.93   2981    3552   64686  13349    100.0    1.207  !DANGEROUS LOAD-DO NOT USE!
+04.0  113    74.36   3041    3696   69696  13438    100.0    1.167  !DANGEROUS LOAD-DO NOT USE!
+06.0  115    75.79   3100    3842   75155  13521    100.0    1.129  !DANGEROUS LOAD-DO NOT USE!
+08.0  117    77.22   3159    3990   81138  13599    100.0    1.093  !DANGEROUS LOAD-DO NOT USE!
+10.0  119    78.65   3218    4140   87687  13670    100.0    1.057  !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    109    71.50   3045    3706   75227  12708    100.0    1.144  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    109    71.50   2728    2974   47589  13754     98.4    1.384

Code:

Cartridge          : 7 mm Rem. Mag.(SAAMI)
Bullet             : .284, 180, Berger Hunt VLD G7 #28502
Useable Case Capaci: 71.029 grain H2O = 4.612 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Accurate MAGPRO

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   77    53.44   2271    2062   30606  10655     88.7    1.719
-18.0   79    54.78   2331    2171   32740  11020     90.1    1.675
-16.0   81    56.11   2390    2284   35029  11374     91.4    1.631
-14.0   83    57.45   2450    2399   37475  11717     92.6    1.587
-12.0   84    58.78   2510    2518   40063  12047     93.8    1.537
-10.0   86    60.12   2570    2640   42811  12362     94.8    1.488
-08.0   88    61.46   2630    2765   45745  12661     95.8    1.442
-06.0   90    62.79   2690    2893   48879  12942     96.7    1.397
-04.0   92    64.13   2750    3023   52229  13204     97.4    1.354  ! Near Maximum !
-02.0   94    65.46   2810    3156   55810  13445     98.1    1.312  ! Near Maximum !
+00.0   96    66.80   2870    3292   59643  13665     98.7    1.273  ! Near Maximum !
+02.0   98    68.14   2930    3430   63746  13861     99.2    1.234  !DANGEROUS LOAD-DO NOT USE!
+04.0  100    69.47   2989    3571   68143  14032     99.5    1.197  !DANGEROUS LOAD-DO NOT USE!
+06.0  102    70.81   3048    3713   72861  14178     99.8    1.161  !DANGEROUS LOAD-DO NOT USE!
+08.0  104    72.14   3107    3858   77928  14297     99.9    1.126  !DANGEROUS LOAD-DO NOT USE!
+10.0  106    73.48   3165    4005   83376  14388    100.0    1.093  !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     96    66.80   3011    3623   72294  13287    100.0    1.171  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     96    66.80   2676    2862   47378  13265     92.6    1.407

Code:

Cartridge          : 7 mm Rem. Mag.(SAAMI)
Bullet             : .284, 180, Berger Hunt VLD G7 #28502
Useable Case Capaci: 71.029 grain H2O = 4.612 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-22

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   77    50.88   2298    2111   31747  10527     94.0    1.695
-18.0   79    52.15   2355    2216   33894  10839     95.1    1.651
-16.0   81    53.42   2411    2323   36181  11136     96.0    1.609
-14.0   83    54.70   2467    2433   38592  11420     96.9    1.561
-12.0   85    55.97   2523    2545   41136  11686     97.7    1.515
-10.0   86    57.24   2579    2659   43837  11935     98.3    1.469
-08.0   88    58.51   2635    2775   46707  12166     98.9    1.426
-06.0   90    59.78   2690    2893   49757  12377     99.3    1.384
-04.0   92    61.06   2745    3012   52999  12567     99.6    1.343  ! Near Maximum !
-02.0   94    62.33   2800    3133   56446  12735     99.9    1.304  ! Near Maximum !
+00.0   96    63.60   2854    3256   60114  12880    100.0    1.267  ! Near Maximum !
+02.0   98    64.87   2908    3380   64017  13004    100.0    1.231  !DANGEROUS LOAD-DO NOT USE!
+04.0  100    66.14   2961    3505   68176  13120    100.0    1.196  !DANGEROUS LOAD-DO NOT USE!
+06.0  102    67.42   3014    3631   72608  13233    100.0    1.163  !DANGEROUS LOAD-DO NOT USE!
+08.0  104    68.69   3066    3758   77336  13341    100.0    1.131  !DANGEROUS LOAD-DO NOT USE!
+10.0  106    69.96   3118    3887   82386  13446    100.0    1.099  !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     96    63.60   2966    3517   72016  12407    100.0    1.174  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     96    63.60   2689    2889   48380  12949     96.8    1.392

pharmseller · Dec 27, 2015

Thanks, the Retumbo data was just what I was looking for!

P

MAinAR · Dec 27, 2015

I have a hard time getting enough Retumbo in the case in 7RM. I much prefer H1000 or RL 26 with the 180 grain bullets but the H1000 is most temperature stable.

Since you have the Magpro it much better fits case capacity and it will hit close to 2,900 fps.

FOTIS · Dec 27, 2015

Code:

Cartridge          : 7 mm Rem. Mag.(SAAMI)
Bullet             : .284, 180, Berger VLD #28405
Useable Case Capaci: 71.029 grain H2O = 4.612 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length      : 24.0 inch = 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 63375 psi, or 436 MPa
or a maximum loading ratio or filling of 110 %
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 !

201 loads produced a Loading Ratio below user-defined minimum of 90%. These powders have been skipped.
Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
ADI AR 2218                        110.0     76.7     4.97    3011    98.3    62930   15594   1.205  ! Near Maximum !
Vihtavuori N570                    106.4     73.4     4.76    3001    98.1    63375   15272   1.225  ! Near Maximum !
ReloadSwiss RS 80                  109.5     77.8     5.04    2997    98.9    63375   15049   1.220  ! Near Maximum !
Alliant Reloder-33                 108.2     76.8     4.98    2990    98.4    63375   15102   1.225  ! Near Maximum !
Hodgdon Retumbo                    110.0     72.4     4.69    2960   100.0    62993   13315   1.221  ! Near Maximum !
ADI AR 2225                        110.0     72.4     4.69    2960   100.0    62993   13315   1.221  ! Near Maximum !
Bofors RP30                        105.4     69.0     4.47    2932   100.0    63375   13606   1.240  ! Near Maximum !
Norma MRP 2                        105.4     69.0     4.47    2932   100.0    63375   13606   1.240  ! Near Maximum !
PB Clermont PCL 517                100.3     70.1     4.54    2932   100.0    63375   13372   1.225  ! Near Maximum !
SNPE Vectan SP 12                  100.1     70.0     4.53    2930   100.0    63375   13339   1.225  ! Near Maximum !
Vihtavuori N560                     97.4     65.2     4.22    2928    99.7    63375   13650   1.230  ! Near Maximum !
Alliant Reloder-26                  94.4     66.4     4.30    2926   100.0    63375   12897   1.247  ! Near Maximum !
Accurate MAGPRO                     97.7     68.0     4.41    2924    99.1    63375   13845   1.237  ! Near Maximum !
Norma MRP                           95.6     65.3     4.23    2919   100.0    63375   13072   1.239  ! Near Maximum !
IMR 7828                           101.8     64.8     4.20    2918    99.9    63375   13189   1.220  ! Near Maximum !
IMR 7828 SSC                        96.3     64.8     4.20    2918    99.9    63375   13189   1.220  ! Near Maximum !
Alliant Reloder-25                 103.2     67.2     4.36    2916   100.0    63375   12590   1.230  ! Near Maximum !
ReloadSwiss RS 70                   92.9     64.8     4.20    2913   100.0    63375   12684   1.223  ! Near Maximum !
ADI AP 2214                        101.4     68.9     4.47    2911   100.0    63375   12934   1.214  ! Near Maximum !
Hodgdon H1000                      106.6     69.1     4.47    2909   100.0    63375   12898   1.214  ! Near Maximum !
ADI AR 2217                        106.6     69.1     4.47    2909   100.0    63375   12898   1.214  ! Near Maximum !
ADI AR 2213                         97.5     64.5     4.18    2908    99.9    63375   13107   1.217  ! Near Maximum !
Bofors RP5/NP ~approximation        97.7     64.7     4.19    2899   100.0    63375   12985   1.237  ! Near Maximum !
Raufoss RA15                        97.7     64.7     4.19    2899   100.0    63375   12985   1.237  ! Near Maximum !
Alliant Reloder-22                  97.7     64.7     4.19    2899   100.0    63375   12985   1.237  ! Near Maximum !
Bofors RP15                        100.3     65.0     4.21    2899   100.0    63375   13016   1.237  ! Near Maximum !
Winchester WXR                     100.3     65.0     4.21    2899   100.0    63375   13016   1.237  ! Near Maximum !
Vihtavuori 24N41                   108.9     75.9     4.92    2895    93.0    63375   13928   1.217  ! Near Maximum !
Hodgdon H870                       110.0     74.4     4.82    2890    98.5    57168   14478   1.286  ! Near Maximum !
Norma 217                          110.0     70.9     4.60    2890   100.0    57503   13612   1.295  ! Near Maximum !
Bofors RP5 NT ~approximation       101.2     67.6     4.38    2885    99.0    63375   13117   1.218  ! Near Maximum !
Alliant Reloder-50                 110.0     77.9     5.05    2882    96.6    56293   15080   1.317  ! Near Maximum !
Ramshot Magnum                      97.6     69.6     4.51    2881   100.0    63375   12391   1.234  ! Near Maximum !
Rottweil R905                       99.1     64.4     4.17    2876    99.7    63375   12835   1.235  ! Near Maximum !
ADI AR 2209                         94.5     61.5     3.99    2863   100.0    63375   12352   1.224  ! Near Maximum !
Alliant Reloder-19                  95.0     62.2     4.03    2861   100.0    63375   12412   1.231  ! Near Maximum !
Bofors RP14 ~approximation          95.7     62.6     4.06    2855   100.0    63375   12332   1.232  ! Near Maximum !
Hodgdon H4831                      100.2     63.7     4.13    2847    99.6    63375   12431   1.228  ! Near Maximum !
Hodgdon H4831 SC                    96.3     63.7     4.13    2847    99.6    63375   12431   1.228  ! Near Maximum !
Vihtavuori N170                    109.5     70.9     4.60    2845    96.7    63375   13054   1.247  ! Near Maximum !
Alliant Reloder-23                  99.8     63.9     4.14    2845   100.0    63375   11643   1.250  ! Near Maximum !
Ramshot Hunter                      90.6     61.2     3.97    2843   100.0    63375   11876   1.240  ! Near Maximum !
Norma 204                           90.2     61.0     3.95    2841   100.0    63375   12129   1.231  ! Near Maximum !
Bofors RP4 ~approximation           93.2     61.0     3.95    2841   100.0    63375   12129   1.231  ! Near Maximum !
Raufoss RA4                         93.2     61.0     3.95    2841   100.0    63375   12129   1.231  ! Near Maximum !
Lovex D100                         106.3     74.9     4.86    2824    93.6    63375   12855   1.236  ! Near Maximum !
Somchem S385                        95.1     62.9     4.08    2822   100.0    63375   11789   1.252  ! Near Maximum !
Winchester Supreme 780              93.9     64.8     4.20    2820   100.0    63375   11842   1.238  ! Near Maximum !
Rottweil R904                       94.2     60.8     3.94    2819    99.8    63375   11931   1.231  ! Near Maximum !
Norma URP                           90.1     58.4     3.78    2815   100.0    63375   11365   1.247  ! Near Maximum !
Bofors RP19 ~approximation          90.2     58.4     3.78    2815   100.0    63375   11362   1.247  ! Near Maximum !
Bofors RP4 NT ~approximation        90.9     60.4     3.92    2812   100.0    63375   11573   1.244  ! Near Maximum !
Vihtavuori N165                    100.2     64.9     4.21    2811   100.0    63375   11561   1.243  ! Near Maximum !
Bofors 12,7mmRA NC1214 Lot20115087 110.0     76.2     4.94    2807    89.2    57034   14278   1.329  ! Near Maximum !
Somchem S365                        91.6     59.6     3.86    2806   100.0    63375   11016   1.257  ! Near Maximum !
Vihtavuori N160                    100.5     63.1     4.09    2804    99.8    63375   11731   1.234  ! Near Maximum !
Lovex S071                         103.5     64.1     4.15    2802   100.0    63375   11396   1.269  ! Near Maximum !
Accurate 3100                       97.9     64.1     4.15    2802   100.0    63375   11396   1.269  ! Near Maximum !
Hodgdon H4350                       92.9     59.5     3.85    2801   100.0    63375   11395   1.234  ! Near Maximum !
IMR 4350                            91.1     59.4     3.85    2800   100.0    63375   11365   1.234  ! Near Maximum !
IMR 4831                            94.5     59.3     3.84    2797   100.0    63375   11121   1.256  ! Near Maximum !
Lovex S070                          90.2     58.4     3.79    2796   100.0    63375   11357   1.250  ! Near Maximum !
Somchem S361                        93.3     65.1     4.22    2795    99.5    63375   11780   1.241  ! Near Maximum !
Hodgdon Hybrid 100V                 92.5     58.6     3.80    2768   100.0    63375   10503   1.250  ! Near Maximum !
Hodgdon US 869                     110.0     76.7     4.97    2748    90.5    53984   13363   1.321
Hodgdon 50BMG                      110.0     73.1     4.74    2743    86.4    53894   13446   1.320
Vihtavuori N150                     90.7     56.0     3.63    2709   100.0    63375    9958   1.259  ! Near Maximum !
SNPE Vectan SP 13                  110.0     73.6     4.77    2688    94.3    49833   12965   1.380
Accurate 8700                      110.0     75.2     4.87    2681    94.0    48625   13019   1.378
Vihtavuori 20N29                   110.0     77.5     5.02    2667    91.2    47724   13247   1.403
PB Clermont PCL 513/520/9520       110.0     73.6     4.77    2628    91.8    46562   12756   1.421
NC A3502 ,test only                110.0     70.5     4.57    2417    68.9    41098   10776   1.491
TLP A 502(RH) ,test only           110.0     70.5     4.57    2395    72.7    38916   10993   1.534
Vihtavuori N32C Tin Star            98.1     32.1     2.08    2033   100.0    63375    4668   1.338  ! Near Maximum !
IMR TrailBoss                      110.0     24.3     1.57    1756   100.0    41983    3663   1.605
ADI AS 25 BP                       110.0     24.3     1.57    1756   100.0    41983    3663   1.605
V1734 7-multiperf ,test only       110.0     70.5     4.57    1709    34.0    20974    5313   2.018

pharmseller · Jan 15, 2016

Thanks for all the help, I'll be happy with 2900 mv. I'm starting with MagPro.

P

pharmseller · Jan 16, 2016

68 grains MagPro got me 2830 fps MV. HSM claims 2845 fps, chrono shows 2750.

I'm hoping for 2900. Retumbo is up next.

My brother might have a slow barrel.

P

SJB358 · Jan 17, 2016

pharmseller":2jnz14pz said:
68 grains MagPro got me 2830 fps MV. HSM claims 2845 fps, chrono shows 2750.

I'm hoping for 2900. Retumbo is up next.

My brother might have a slow barrel.

P

Keep pushing it Pharm. use your speed and regular signs as your guide. Going by the data it's max'ed at 60K and you've got room to spare in my opinion. MAGpro has worked well for me.

FOTIS · Jan 17, 2016

Like I said....The limiting factor in pressure is the brass. So I can not see the 270 and the 308 being rated at 65k psi and the 7 mag at 61k. I have had plenty of 7s and run them all at 65k.

YMMV!

SJB358 · Jan 17, 2016

FOTIS":2cb8dvqy said:
Like I said....The limiting factor in pressure is the brass. So I can not see the 270 and the 308 being rated at 65k psi and the 7 mag at 61k. I have had plenty of 7s and run them all at 65k.

YMMV!

Same here, I look to aim for 60-63K sorta loads but yeah, if a 25-06 is rated at 65K then a 30-06 is just as happy in that range as well.

pharmseller · Jan 22, 2016

Here's a chrono update.

I only fired two each, but the velocity difference between the same charges was minimal, so I'm sure the numbers are representational.

67.5 grains MagPro, 180 VLD Hunting, WLRM, 3.290" OAL, 2756 fps.

Same, but 68 grains, 2830 fps.

Primers were slightly flat on both, but no ejector marks.

I loaded some Retumbo, I'll try it tomorrow.

P

pharmseller · Jan 23, 2016

RETUMBO RESULTS:

72.4, two shots, third wouldn't chamber. 2881, 2964. Dunno what happened on the first shot.

72.0, 3 shots averaged 2953, ES 26

71.5, 3 shots averaged 2916, ES 22.

Primers looked a little flat but I'm not a good judge.

Surprisingly close to Quickload predicted values, thanks again. 2900 MV was the goal, looks like it's time for a seating depth test at the range.

P

Help needed, 7mm Rem Mag, 180 Berger VLD RETUMBO RESULTS

pharmseller

Handloader

pharmseller

Handloader

FOTIS

Range Officer

DrMike

Ballistician

pharmseller

Handloader

MAinAR

Handloader

FOTIS

Range Officer

pharmseller

Handloader

pharmseller

Handloader

SJB358

Ballistician

FOTIS

Range Officer

SJB358

Ballistician

pharmseller

Handloader

pharmseller

Handloader

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