QL for 375 Ultra Mag

[frankm]

Would someone be so kind to run me QL s on the following? Data is hard to come by for the 375 RUM.

Fed 215
24" barrel

1. 270 Hornady SP
R22 and H4350
3.590 OAL

2 300 Sierra GK
R22 and H4350
3.590 OAL

3. 350 TSX FB
H4350
3.550 OAL

Know I m asking for a lot but sure appreciate anyone's help. No hurry for data; just decided to drag rifle out and get some loads going for it. Been 12 years or so since I ve shot it. Checked my notes and it's got 92 total rounds through it ... hopefully the recoil doesn't convince me to sell it. lol

 

[DrMike]

Cartridge          : .375 Rem Ultra Mag
Bullet             : .375, 270, Hornady SP 3710
Useable Case Capaci: 103.509 grain H2O = 6.721 cm³
Cartridge O.A.L. L6: 3.590 inch = 91.19 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 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   96    92.16   2619    4114   43985  10564     95.8    1.357
-09.0   97    93.18   2650    4210   45566  10682     96.2    1.335
-08.0   98    94.21   2681    4308   47207  10795     96.7    1.314
-07.0   99    95.23   2711    4407   48911  10903     97.1    1.292
-06.0  100    96.26   2742    4507   50683  11006     97.5    1.272
-05.0  101    97.28   2772    4608   52524  11105     97.9    1.252
-04.0  102    98.30   2803    4710   54440  11198     98.2    1.232  ! Near Maximum !
-03.0  103    99.33   2833    4813   56430  11286     98.5    1.212  ! Near Maximum !
-02.0  104   100.35   2864    4917   58508  11368     98.8    1.193  ! Near Maximum !
-01.0  105   101.38   2894    5022   60659  11445     99.1    1.174  ! Near Maximum !
+00.0  106   102.40   2925    5128   62887  11516     99.3    1.156  ! Near Maximum !
+01.0  107   103.42   2955    5234   65198  11581     99.5    1.137  !DANGEROUS LOAD-DO NOT USE!
+02.0  108   104.45   2985    5342   67601  11640     99.6    1.119  !DANGEROUS LOAD-DO NOT USE!
+03.0  109   105.47   3015    5450   70100  11692     99.8    1.102  !DANGEROUS LOAD-DO NOT USE!
+04.0  110   106.50   3045    5559   72700  11738     99.9    1.085  !DANGEROUS LOAD-DO NOT USE!
+05.0  111   107.52   3075    5669   75406  11778    100.0    1.068  !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    106   102.40   3059    5611   76682  11105    100.0    1.066  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    106   102.40   2734    4481   50057  11306     94.0    1.273

Cartridge          : .375 Rem Ultra Mag
Bullet             : .375, 270, Hornady SP 3710
Useable Case Capaci: 103.509 grain H2O = 6.721 cm³
Cartridge O.A.L. L6: 3.590 inch = 91.19 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon H4350

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   90    84.15   2562    3936   46176   9337     97.1    1.335
-09.0   91    85.09   2588    4017   47621   9430     97.5    1.316
-08.0   92    86.02   2614    4098   49110   9520     97.8    1.297
-07.0   93    86.96   2640    4180   50644   9606     98.1    1.279
-06.0   94    87.89   2666    4262   52224   9689     98.3    1.262
-05.0   95    88.83   2692    4345   53853   9769     98.6    1.244
-04.0   96    89.76   2718    4429   55533   9846     98.8    1.227  ! Near Maximum !
-03.0   97    90.70   2744    4513   57263   9919     99.0    1.210  ! Near Maximum !
-02.0   98    91.63   2769    4597   59048   9988     99.2    1.194  ! Near Maximum !
-01.0   99    92.57   2795    4683   60888  10054     99.4    1.178  ! Near Maximum !
+00.0  100    93.50   2820    4768   62785  10116     99.6    1.162  ! Near Maximum !
+01.0  101    94.44   2845    4854   64742  10173     99.7    1.146  !DANGEROUS LOAD-DO NOT USE!
+02.0  102    95.37   2871    4941   66761  10228     99.8    1.131  !DANGEROUS LOAD-DO NOT USE!
+03.0  103    96.31   2896    5027   68844  10277     99.9    1.116  !DANGEROUS LOAD-DO NOT USE!
+04.0  104    97.24   2921    5115   70994  10323     99.9    1.101  !DANGEROUS LOAD-DO NOT USE!
+05.0  105    98.18   2946    5202   73213  10365    100.0    1.086  !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    100    93.50   2923    5121   73424   9783    100.0    1.088  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    100    93.50   2675    4289   52284  10044     95.6    1.259

 

[DrMike]

Cartridge          : .375 Rem Ultra Mag
Bullet             : .375, 300, Sierra SPBT 3000
Useable Case Capaci: 100.414 grain H2O = 6.520 cm³
Cartridge O.A.L. L6: 3.590 inch = 91.19 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 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    87.93   2498    4158   44109  10315     96.9    1.420
-09.0   95    88.91   2527    4253   45665  10422     97.3    1.397
-08.0   96    89.88   2555    4349   47277  10525     97.7    1.375
-07.0   97    90.86   2584    4446   48952  10623     98.0    1.354
-06.0   98    91.84   2612    4544   50688  10716     98.4    1.333
-05.0   99    92.82   2640    4643   52499  10805     98.6    1.312
-04.0  100    93.79   2668    4743   54371  10888     98.9    1.291  ! Near Maximum !
-03.0  101    94.77   2696    4843   56304  10966     99.1    1.272  ! Near Maximum !
-02.0  102    95.75   2724    4944   58302  11040     99.4    1.252  ! Near Maximum !
-01.0  103    96.72   2752    5046   60374  11107     99.5    1.232  ! Near Maximum !
+00.0  104    97.70   2780    5149   62524  11169     99.7    1.214  ! Near Maximum !
+01.0  105    98.68   2808    5252   64755  11225     99.8    1.195  !DANGEROUS LOAD-DO NOT USE!
+02.0  106    99.65   2836    5357   67070  11276     99.9    1.177  !DANGEROUS LOAD-DO NOT USE!
+03.0  108   100.63   2863    5461   69474  11321    100.0    1.159  !DANGEROUS LOAD-DO NOT USE!
+04.0  109   101.61   2891    5567   71972  11359    100.0    1.141  !DANGEROUS LOAD-DO NOT USE!
+05.0  110   102.59   2918    5673   74566  11392    100.0    1.124  !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    104    97.70   2900    5601   75994  10726    100.0    1.122  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    104    97.70   2607    4527   49784  11089     95.2    1.335

Cartridge          : .375 Rem Ultra Mag
Bullet             : .375, 300, Sierra SPBT 3000
Useable Case Capaci: 100.414 grain H2O = 6.520 cm³
Cartridge O.A.L. L6: 3.590 inch = 91.19 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon H4350

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   89    80.55   2445    3981   46565   9098     98.1    1.394
-09.0   90    81.45   2469    4060   47997   9182     98.4    1.374
-08.0   91    82.34   2493    4141   49470   9264     98.6    1.355
-07.0   92    83.24   2517    4221   50988   9342     98.8    1.337
-06.0   93    84.13   2541    4303   52550   9417     99.0    1.319
-05.0   94    85.03   2565    4384   54158   9489     99.2    1.301
-04.0   95    85.92   2589    4466   55814   9557     99.4    1.283  ! Near Maximum !
-03.0   96    86.82   2613    4549   57520   9622     99.6    1.266  ! Near Maximum !
-02.0   97    87.71   2637    4632   59277   9684     99.7    1.249  ! Near Maximum !
-01.0   98    88.61   2661    4715   61087   9741     99.8    1.233  ! Near Maximum !
+00.0   99    89.50   2684    4799   62952   9795     99.9    1.216  ! Near Maximum !
+01.0  100    90.40   2708    4884   64874   9846     99.9    1.200  !DANGEROUS LOAD-DO NOT USE!
+02.0  101    91.29   2731    4968   66855   9892    100.0    1.185  !DANGEROUS LOAD-DO NOT USE!
+03.0  102    92.19   2754    5053   68896   9935    100.0    1.169  !DANGEROUS LOAD-DO NOT USE!
+04.0  103    93.08   2777    5138   71001   9974    100.0    1.154  !DANGEROUS LOAD-DO NOT USE!
+05.0  104    93.98   2800    5224   73172  10012    100.0    1.139  !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     99    89.50   2774    5127   73458   9445    100.0    1.141  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     99    89.50   2553    4342   52541   9832     96.7    1.316

 

[DrMike]

Cartridge          : .375 Rem Ultra Mag
Bullet             : .375, 350, Barnes 'TSX' 30494
Useable Case Capaci: 93.513 grain H2O = 6.072 cm³
Cartridge O.A.L. L6: 3.590 inch = 91.19 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon H4350

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   85    72.00   2230    3864   47313   8288     99.0    1.475
-09.0   86    72.80   2251    3936   48602   8360     99.1    1.459
-08.0   87    73.60   2271    4009   49927   8430     99.3    1.443
-07.0   88    74.40   2292    4083   51288   8497     99.4    1.428
-06.0   89    75.20   2313    4156   52687   8561     99.6    1.413
-05.0   90    76.00   2333    4231   54125   8623     99.7    1.398
-04.0   91    76.80   2354    4305   55603   8682     99.8    1.383  ! Near Maximum !
-03.0   92    77.60   2374    4380   57122   8739     99.9    1.368  ! Near Maximum !
-02.0   93    78.40   2394    4455   58683   8792     99.9    1.354  ! Near Maximum !
-01.0   94    79.20   2415    4531   60288   8843    100.0    1.340  ! Near Maximum !
+00.0   95    80.00   2435    4607   61939   8890    100.0    1.325  ! Near Maximum !
+01.0   96    80.80   2455    4683   63636   8935    100.0    1.311  !DANGEROUS LOAD-DO NOT USE!
+02.0   97    81.60   2475    4760   65382   8978    100.0    1.297  !DANGEROUS LOAD-DO NOT USE!
+03.0   98    82.40   2495    4836   67177   9020    100.0    1.284  !DANGEROUS LOAD-DO NOT USE!
+04.0   99    83.20   2514    4913   69023   9062    100.0    1.269  !DANGEROUS LOAD-DO NOT USE!
+05.0  100    84.00   2534    4991   70923   9103    100.0    1.253  !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     95    80.00   2508    4890   71373   8573    100.0    1.255  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     95    80.00   2326    4205   52604   9017     97.7    1.409

 

[JD338]

What make and model do you have?

JD338

 

[DrMike]

Just noticed that I got the OAL wrong on the load for the 350 grain Barnes TSX. Here is the projection with the data provided.

Cartridge          : .375 Rem Ultra Mag
Bullet             : .375, 350, Barnes 'TSX' 30494
Useable Case Capaci: 92.401 grain H2O = 6.000 cm³
Cartridge O.A.L. L6: 3.550 inch = 90.17 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon H4350

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   86    71.37   2224    3843   47206   8200     98.9    1.477
-09.0   87    72.16   2245    3915   48494   8272     99.1    1.462
-08.0   88    72.96   2265    3988   49818   8341     99.2    1.446
-07.0   88    73.75   2286    4061   51179   8408     99.4    1.430
-06.0   89    74.54   2307    4135   52578   8473     99.5    1.415
-05.0   90    75.34   2327    4209   54015   8534     99.6    1.400
-04.0   91    76.13   2348    4283   55493   8593     99.8    1.385  ! Near Maximum !
-03.0   92    76.92   2368    4358   57013   8650     99.8    1.370  ! Near Maximum !
-02.0   93    77.71   2388    4433   58575   8703     99.9    1.356  ! Near Maximum !
-01.0   94    78.51   2409    4508   60182   8754    100.0    1.342  ! Near Maximum !
+00.0   95    79.30   2429    4584   61833   8801    100.0    1.327  ! Near Maximum !
+01.0   96    80.09   2449    4660   63532   8846    100.0    1.313  !DANGEROUS LOAD-DO NOT USE!
+02.0   97    80.89   2469    4737   65280   8888    100.0    1.299  !DANGEROUS LOAD-DO NOT USE!
+03.0   98    81.68   2489    4813   67077   8930    100.0    1.286  !DANGEROUS LOAD-DO NOT USE!
+04.0   99    82.47   2508    4890   68926   8971    100.0    1.271  !DANGEROUS LOAD-DO NOT USE!
+05.0  100    83.27   2528    4967   70829   9012    100.0    1.255  !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     95    79.30   2503    4869   71288   8484    100.0    1.257  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     95    79.30   2320    4182   52489   8917     97.6    1.411

 

[SJB358]

That’s a hammer of a cartridge. Good luck with it. Talk about some drive behind big Bullets.

 

[Thebear_78]

I’ve been using 414 for my 375 RUM


Sent from my iPhone using Tapatalk

 

[frankm]

Dr Mike, thank you Sir! That was fast!

Jim, it's a Rem 700 XCR, Synthetic stock and nitride barrel and action coating. It's has been a safe queen.. when I originally got her did all the barrel breakin, got the iron sights dialed in and mounted a VXIII 1.5-5x on it , shoots MOA or better with 300 and 270 gr Hornady's. ( U got to bare down on the bench though!)
Round count including barrel breakin under 100... still have the empty once fired cases.

 

[JD338]

Thanks Frank. Nice rifle.

JD338

 

[frankm]

Thank you.

I d never had anything bigger than 30 cal and thought a medium bore would be fun to have. I was in my late 40 s at the time and had some thoughts about maybe getting to Alaska. Short story is my Dad got sick and passed, my sister who was single got a brain tumor and had to take care of her for 10 months and she passed, and 2 years ago lost my Mother. So now I m in my early 60 s and not sure if I ll ever do a hunt where I need a medium bore!! I ve not hunted once with the rifle or taken any critter.

But, the holes are easier to spot in the paper than smaller rounds!!!

 

[IdahoCTD]

Sounds like you need to go to AK or Africa. I've been up to AK the last 2 years and 4 other times besides that hunting. It's not crazy expensive if you do a DIY hunt.

I had a 375 RUM for a while and it was too much of a good thing IMO. The 375-358STA I have now and some of the 375 JRS's we made got about equal velocites with less powder and recoil.

 

[elkhunternm]

Frankm,sorry about your losses.

I have a .375 RUM and with a 260 grain Nosler Partition and H-4831 it is getting an average velocity of 2900 fps. That is from a 26" barrel.

The high right shot is the first one from a clean barrel. The target was 100 yards away.

I used a 300 grain bullet for the bunny,but here is a picture of the rifle.

 

[frankm]

Ken, Very nice looking rifle! I like that laminate stock. What make is the stock?

She's a shooter no doubt. Those 375 UM s are accurate. Nosler has a note in their data that the 375 Ultra Magnum is their 37 caliber of choice for their accuracy/bullet testing!
Frank

 

[gbflyer]

Always impressed with the groups some of the medium bores produce. I had a .375 H&H briefly, the recoil off the bench outside the Lead Sled had me wanting to run home to momma! Doesn’t bother my old late 70’s shooting pard one bit though. Not bad off hand. The RUM must really pack a punch!

 

[elkhunternm]

Frankm,it is a Boyds laminated stock.

 

[steve99]

My Rem700BDL.375RUM has a 25"bbl. I use 270gn Barnes TSX.

Here's some chronographed loads - 5 shot average.

93gns H4350.......2880fps
100gns RL 19.......2904fps
90gns RL17........2895fps
100gns RL26.......2795fps

 

[FOTIS]

99 grains of 7828sc and 260 AB or Barnes TSX. almost 3k fps and 1/2". Model 700 BDL