Can someone do a QL for a .375 RUM with 350gr Sierra MK's?

IdahoCTD

Handloader
Nov 4, 2004
2,772
967
My rifle has a 26" barrel. I want to see what they say for velocity and the better powders to use. I'm thinking H4831 and slower. Maybe even H-1000, Magnum, R-25, and Retumbo like a Edge.
 
Oh man, that is going to be a long range hammer!

JD338
 
Code:
Cartridge          : .375 Rem Ultra Mag
Bullet             : .375, 350, Sierra HPBT MatchKing
Useable Case Capaci: 90.976 grain H2O = 5.907 cm³
Cartridge O.A.L. L6: 3.600 inch = 91.44 mm
Barrel Length      : 26.0 inch = 660.4 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 63000 psi, or 434 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 !

20 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
---------------------------------  -----------------------------------------------------------------
Alliant Reloder-33                 112.0    103.2     6.69    2657    98.0    60743   10557   1.363  ! Near Maximum !
Vihtavuori N570                    112.0     99.0     6.42    2656    97.3    59666   10677   1.373  ! Near Maximum !
Vihtavuori N560                    103.9     89.0     5.77    2632    99.6    63000    9654   1.355  ! Near Maximum !
PB Clermont PCL 517                106.7     95.5     6.19    2631    99.9    63000    9427   1.346  ! Near Maximum !
Norma MRP                          102.1     89.4     5.79    2631   100.0    63000    9266   1.360  ! Near Maximum !
SNPE Vectan SP 12                  106.6     95.4     6.18    2631   100.0    63000    9405   1.346  ! Near Maximum !
Alliant Reloder-25                 110.3     92.0     5.96    2627   100.0    63000    8898   1.349  ! Near Maximum !
Accurate MAGPRO                    104.2     92.9     6.02    2627    98.9    63000    9774   1.362  ! Near Maximum !
Norma MRP 2                        112.0     93.9     6.09    2626    99.9    61463    9609   1.373  ! Near Maximum !
Bofors RP30                        112.0     93.9     6.09    2626    99.9    61463    9609   1.373  ! Near Maximum !
IMR 7828                           108.4     88.3     5.72    2616    99.8    63000    9285   1.347  ! Near Maximum !
IMR 7828 SSC                       102.5     88.3     5.72    2616    99.8    63000    9285   1.347  ! Near Maximum !
Bofors RP5/NP ~approximation       104.2     88.3     5.72    2607   100.0    63000    9196   1.363  ! Near Maximum !
Raufoss RA15                       104.2     88.3     5.72    2607   100.0    63000    9196   1.363  ! Near Maximum !
Alliant Reloder-22                 104.2     88.3     5.72    2607   100.0    63000    9196   1.363  ! Near Maximum !
Bofors RP15                        107.0     88.7     5.75    2606   100.0    63000    9220   1.364  ! Near Maximum !
Winchester WXR                     107.0     88.7     5.75    2606   100.0    63000    9220   1.364  ! Near Maximum !
ADI AR 2213                        103.5     87.8     5.69    2604    99.7    63000    9245   1.347  ! Near Maximum !
ADI AP 2214                        107.4     93.5     6.06    2597    99.9    63000    9081   1.345  ! Near Maximum !
Ramshot Magnum                     103.9     94.9     6.15    2588   100.0    63000    8719   1.356  ! Near Maximum !
Rottweil R905                      105.3     87.7     5.68    2577    99.5    63000    9036   1.366  ! Near Maximum !
Bofors RP5 NT ~approximation       107.2     91.6     5.94    2577    98.7    63000    9235   1.353  ! Near Maximum !
ADI AR 2217                        112.0     92.9     6.02    2572    99.8    61055    9028   1.363  ! Near Maximum !
Hodgdon H1000                      112.0     92.9     6.02    2572    99.8    61055    9028   1.363  ! Near Maximum !
ADI AR 2209                        100.3     83.7     5.42    2565   100.0    63000    8718   1.358  ! Near Maximum !
Alliant Reloder-19                 100.9     84.6     5.48    2564   100.0    63000    8772   1.366  ! Near Maximum !
Elcho 17                            91.5     80.5     5.22    2560   100.0    63000    8148   1.370  ! Near Maximum !
Alliant Reloder-17                  91.5     80.5     5.22    2560   100.0    63000    8148   1.370  ! Near Maximum !
Bofors RP14 ~approximation         101.6     85.2     5.52    2558   100.0    63000    8712   1.367  ! Near Maximum !
PB Clermont PCL 511                 93.3     83.3     5.40    2553   100.0    63000    8400   1.374  ! Near Maximum !
Ramshot Hunter                      96.4     83.5     5.41    2552   100.0    63000    8388   1.374  ! Near Maximum !
Hodgdon H414                        91.0     80.7     5.23    2550   100.0    63000    8397   1.376  ! Near Maximum !
Winchester 760                      91.0     80.7     5.23    2550   100.0    63000    8397   1.376  ! Near Maximum !
Hodgdon H4831 SC                   102.1     86.5     5.61    2544    99.4    63000    8745   1.365  ! Near Maximum !
Hodgdon H4831                      106.2     86.5     5.61    2544    99.4    63000    8745   1.365  ! Near Maximum !
ADI AR 2218                        112.0    100.1     6.48    2543    95.4    53644   10580   1.433
Raufoss RA4                         98.8     82.9     5.37    2541    99.9    63000    8551   1.369  ! Near Maximum !
Norma 204                           95.7     82.9     5.37    2541    99.9    63000    8551   1.369  ! Near Maximum !
Bofors RP4 ~approximation           98.8     82.9     5.37    2541    99.9    63000    8551   1.369  ! Near Maximum !
ADI AR 2225                        112.0     94.4     6.12    2537   100.0    52908    9302   1.445
Hodgdon Retumbo                    112.0     94.4     6.12    2537   100.0    52908    9302   1.445
Somchem S385                       101.1     85.7     5.55    2528   100.0    63000    8304   1.388  ! Near Maximum !
Vihtavuori N550                     93.2     79.8     5.17    2528   100.0    63000    8138   1.387  ! Near Maximum !
Somchem S365                        97.9     81.7     5.29    2526   100.0    63000    7757   1.387  ! Near Maximum !
Norma URP                           95.9     79.5     5.15    2526   100.0    63000    8011   1.383  ! Near Maximum !
Bofors RP19 ~approximation          95.9     79.6     5.16    2526   100.0    63000    8009   1.383  ! Near Maximum !
Winchester Supreme 780              99.5     88.0     5.70    2522   100.0    63000    8346   1.374  ! Near Maximum !
Accurate 4350                       95.0     79.7     5.16    2521   100.0    63000    7948   1.401  ! Near Maximum !
Rottweil R904                       99.6     82.4     5.34    2516    99.7    63000    8379   1.373  ! Near Maximum !
Bofors RP4 NT ~approximation        96.4     82.1     5.32    2516   100.0    63000    8151   1.384  ! Near Maximum !
Vihtavuori N165                    106.4     88.2     5.72    2515   100.0    63000    8126   1.379  ! Near Maximum !
Lovex S071                         110.2     87.4     5.66    2514   100.0    63000    8016   1.403  ! Near Maximum !
Accurate 3100                      104.2     87.4     5.66    2514   100.0    63000    8016   1.403  ! Near Maximum !
IMR 4831                           100.6     80.8     5.23    2509   100.0    63000    7822   1.393  ! Near Maximum !
Hodgdon H4350                       98.3     80.7     5.23    2502   100.0    63000    8010   1.377  ! Near Maximum !
Vihtavuori N160                    106.4     85.5     5.54    2502    99.6    63000    8228   1.376  ! Near Maximum !
Lovex D100                         112.0    101.1     6.55    2501    92.5    62198    8906   1.380  ! Near Maximum !
IMR 4350                            96.5     80.5     5.22    2501   100.0    63000    7988   1.377  ! Near Maximum !
Lovex S070                          95.7     79.4     5.14    2501   100.0    63000    7991   1.393  ! Near Maximum !
Somchem S361                        98.6     88.1     5.71    2492    99.3    63000    8265   1.385  ! Near Maximum !
Vihtavuori 24N41                   112.0    100.1     6.48    2488    90.3    56736    9406   1.418  ! Near Maximum !
Bofors RP7                          93.5     77.0     4.99    2484   100.0    63000    7905   1.388  ! Near Maximum !
Rottweil R907                       93.5     77.0     4.99    2484   100.0    63000    7905   1.388  ! Near Maximum !
IMR 4007 SSC                        90.6     77.0     4.99    2484   100.0    63000    7900   1.388  ! Near Maximum !
Hodgdon Hybrid 100V                 98.4     79.8     5.17    2481   100.0    63000    7358   1.388  ! Near Maximum !
Lovex S065                          94.6     77.6     5.03    2476   100.0    63000    7679   1.395  ! Near Maximum !
Rottweil R903                       90.8     75.3     4.88    2465   100.0    63000    7366   1.409  ! Near Maximum !
Somchem S355                        91.1     74.7     4.84    2464   100.0    63000    7404   1.402  ! Near Maximum !
Hodgdon H870                       112.0     97.0     6.28    2456    96.2    47120    9886   1.529
Vihtavuori N170                    112.0     92.9     6.02    2442    94.6    55231    8865   1.465  ! Near Maximum !
Accurate 2700                       90.8     79.4     5.15    2442   100.0    63000    7460   1.395  ! Near Maximum !
Alliant Reloder-50                 112.0    101.6     6.58    2433    93.4    44478   10208   1.579

Code:
Cartridge          : .375 Rem Ultra Mag
Bullet             : .375, 350, Sierra HPBT MatchKing
Useable Case Capaci: 90.976 grain H2O = 5.907 cm³
Cartridge O.A.L. L6: 3.600 inch = 91.44 mm
Barrel Length      : 26.0 inch = 660.4 mm
Powder             : Vihtavuori N570

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   91    80.24   2066    3319   29071   8277     84.3    1.897
-18.0   93    82.25   2127    3516   31274   8595     86.1    1.839
-16.0   95    84.25   2188    3722   33673   8902     87.8    1.782
-14.0   98    86.26   2250    3936   36279   9198     89.4    1.726
-12.0  100    88.26   2313    4158   39120   9480     90.9    1.666
-10.0  102    90.27   2376    4387   42221   9746     92.4    1.607
-08.0  104    92.28   2439    4625   45612   9995     93.7    1.550
-06.0  107    94.28   2503    4870   49315  10224     94.9    1.496
-04.0  109    96.29   2567    5123   53406  10432     96.0    1.442
-02.0  111    98.29   2632    5383   57895  10616     97.0    1.391  ! Near Maximum !
+00.0  113   100.30   2696    5650   62847  10774     97.8    1.341  ! Near Maximum !
+02.0  116   102.31   2761    5925   68337  10906     98.5    1.293  !DANGEROUS LOAD-DO NOT USE!
+04.0  118   104.31   2826    6207   74425  11008     99.1    1.247  !DANGEROUS LOAD-DO NOT USE!
+06.0  120   106.32   2891    6495   81211  11079     99.5    1.202  !DANGEROUS LOAD-DO NOT USE!
+08.0  123   108.32   2956    6791   88804  11118     99.8    1.158  !DANGEROUS LOAD-DO NOT USE!
+10.0  125   110.33   3021    7093   97337  11121    100.0    1.116  !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    113   100.30   2853    6327   79578  10421    100.0    1.224  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    113   100.30   2479    4777   49329  10343     89.8    1.494
 
Thanks Mike. I'm surprised the velocity is so slow but it could be because of the OAL. I'll shoot them single shot as long as they want to be. That would probably mean 3.8ish. I was expecting 2750fps or so.

A lot of guys have been curious about it on LRH and rather than build a new longer barreled version I'm going to use my existing gun and shoot a few. I actually want to build a .375-.338 Norma IMP. instead even though it would be close to the same thing. It would have a shorter AOL and I have a bunch of Lapua brass that would work perfect for it. The 275gr Cutting Edge brass bullets with a .525 BC would be fun too at 3100+fps.
 
Wow, talk about some long range authority. That's going to be a monster!
 
Thats a MONSTER shoulder beater load - a 378 Weatherby will get you that 2750-2800 fps ! you so desire . RJ
 
Rem Jim":2so5myyu said:
Thats a MONSTER shoulder beater load - a 378 Weatherby will get you that 2750-2800 fps ! you so desire . RJ


I have .378 Weatherby brass I'm just not a big fan of the big Weatherby cases because the brass is pretty weak for the price (I have a .30-378 IMP and had a .338-378). That is why so many people build hot rods out of the Lapua cases.

If I really wanted to get stupid I would probably build a .375 Snipetac and shoot them 3200fps, and I might someday. :mrgreen:
 
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