tyson22250
Beginner
- Nov 8, 2010
- 83
- 0
Wondering if anyone has tested and worked up loads in a 7mm RUM with the 168gr Nosler long range accubonds? I have RETUMBO, H1000 and IMR 7828 on hand would like to use the RETUMBO as I have 8lbs of it.
7mm RUM and long range Accubonds
- Thread starter tyson22250
- Start date
DrMike
Ballistician
- Nov 8, 2006
- 37,402
- 6,210
Here's a possibility for you:
Code:
Cartridge : 7 mm Rem Ultra Mag
Bullet : .284, 168, Nosler Accubond LR 58623 G7
Useable Case Capaci: 100.878 grain H2O = 6.550 cm³
Cartridge O.A.L. L6: 3.600 inch = 91.44 mm
Barrel Length : 26.0 inch = 660.4 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 76 71.28 2487 2308 32004 11868 99.3 1.819
-18.0 78 73.06 2547 2420 34286 12088 99.8 1.776
-16.0 80 74.84 2606 2533 36733 12269 100.0 1.734
-14.0 82 76.63 2664 2647 39360 12416 100.0 1.681
-12.0 84 78.41 2721 2762 42180 12555 100.0 1.628
-10.0 86 80.19 2777 2877 45189 12691 100.0 1.577
-08.0 88 81.97 2832 2992 48367 12823 100.0 1.529
-06.0 90 83.75 2887 3108 51740 12953 100.0 1.483
-04.0 91 85.54 2940 3225 55324 13078 100.0 1.439 ! Near Maximum !
-02.0 93 87.32 2993 3342 59133 13201 100.0 1.397 ! Near Maximum !
+00.0 95 89.10 3046 3460 63181 13319 100.0 1.356 ! Near Maximum !
+02.0 97 90.88 3097 3579 67485 13434 100.0 1.317 !DANGEROUS LOAD-DO NOT USE!
+04.0 99 92.66 3149 3698 72063 13545 100.0 1.280 !DANGEROUS LOAD-DO NOT USE!
+06.0 101 94.45 3200 3819 76935 13652 100.0 1.243 !DANGEROUS LOAD-DO NOT USE!
+08.0 103 96.23 3250 3940 82123 13755 100.0 1.209 !DANGEROUS LOAD-DO NOT USE!
+10.0 105 98.01 3300 4063 87651 13854 100.0 1.175 !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 89.10 3145 3690 76465 12939 100.0 1.252 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 95 89.10 2895 3126 49789 13871 100.0 1.499
Code:
Cartridge : 7 mm Rem Ultra Mag
Bullet : .284, 168, Nosler Accubond LR 58623 G7
Useable Case Capaci: 100.878 grain H2O = 6.550 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 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 !
68 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
--------------------------------- -----------------------------------------------------------------
Vihtavuori N570 92.0 90.2 5.85 3115 99.9 63000 15485 1.360 ! Near Maximum !
Alliant Reloder-33 92.4 94.5 6.12 3093 100.0 63000 15195 1.369 ! Near Maximum !
Alliant Reloder-50 97.5 98.0 6.35 3083 99.9 63000 15490 1.399 ! Near Maximum !
Hodgdon H870 97.6 93.7 6.07 3078 100.0 63000 14684 1.371 ! Near Maximum !
Hodgdon 50BMG 100.9 95.3 6.17 3057 95.0 63000 15319 1.348 ! Near Maximum !
Vihtavuori 24N41 95.8 94.9 6.15 3050 97.7 63000 14790 1.342 ! Near Maximum !
Norma 217 97.1 88.9 5.76 3046 100.0 63000 13655 1.381 ! Near Maximum !
Hodgdon Retumbo 95.2 89.0 5.77 3043 100.0 63000 13314 1.358 ! Near Maximum !
Norma MRP 2 91.6 85.2 5.52 3043 100.0 63000 13651 1.363 ! Near Maximum !
Accurate 8700 102.4 99.3 6.44 3035 99.9 63000 14126 1.362 ! Near Maximum !
Vihtavuori 20N29 102.3 102.4 6.63 3033 99.2 63000 14702 1.380 ! Near Maximum !
Hodgdon US 869 100.3 99.4 6.44 3033 97.8 63000 14754 1.361 ! Near Maximum !
Hodgdon H1000 93.3 85.8 5.56 3028 100.0 63000 13047 1.336 ! Near Maximum !
Vihtavuori N170 96.6 88.9 5.76 2998 99.5 63000 13643 1.357 ! Near Maximum !
Code:
Cartridge : 7 mm Rem Ultra Mag
Bullet : .284, 168, Nosler Accubond LR 58623 G7
Useable Case Capaci: 100.878 grain H2O = 6.550 cm³
Cartridge O.A.L. L6: 3.600 inch = 91.44 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Hodgdon H1000
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 75 68.72 2462 2261 32493 11321 96.9 1.790
-18.0 77 70.44 2521 2371 34752 11601 97.8 1.748
-16.0 78 72.16 2580 2483 37168 11856 98.6 1.704
-14.0 80 73.87 2639 2597 39753 12085 99.2 1.651
-12.0 82 75.59 2697 2713 42519 12286 99.6 1.599
-10.0 84 77.31 2754 2829 45468 12458 99.9 1.551
-08.0 86 79.03 2811 2947 48581 12599 100.0 1.504
-06.0 88 80.75 2867 3066 51888 12718 100.0 1.459
-04.0 90 82.46 2922 3184 55405 12832 100.0 1.416 ! Near Maximum !
-02.0 92 84.18 2976 3304 59148 12943 100.0 1.375 ! Near Maximum !
+00.0 93 85.90 3030 3424 63133 13051 100.0 1.335 ! Near Maximum !
+02.0 95 87.62 3083 3545 67377 13154 100.0 1.297 !DANGEROUS LOAD-DO NOT USE!
+04.0 97 89.34 3135 3667 71899 13254 100.0 1.260 !DANGEROUS LOAD-DO NOT USE!
+06.0 99 91.05 3187 3790 76722 13350 100.0 1.225 !DANGEROUS LOAD-DO NOT USE!
+08.0 101 92.77 3239 3913 81870 13442 100.0 1.191 !DANGEROUS LOAD-DO NOT USE!
+10.0 103 94.49 3290 4038 87368 13530 100.0 1.158 !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 93 85.90 3131 3657 75307 12648 100.0 1.239 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 93 85.90 2875 3084 50901 13526 99.4 1.465- Thread starter
- #3
tyson22250
Beginner
- Nov 8, 2010
- 83
- 0
Thanks Dr mike.... Much appreciated!
I only loaded the Barnes 140 TTSX in my former 7mm RUM. I had great results with 7828 but "outstanding" results with Retumbo. I had the same results using Retumbo in two different 300 RUMS. In my opinion, it starts and stops there in the big RUM cases. Good luck to you Pard. Jim
